draft-ietf-bmwg-igp-dataplane-conv-term-00.txt | draft-ietf-bmwg-igp-dataplane-conv-term-01.txt | |||
---|---|---|---|---|

Network Working Group | Network Working Group | |||

INTERNET-DRAFT | INTERNET-DRAFT | |||

Expires in: December 2003 | Expires in: April 2004 | |||

Scott Poretsky | Scott Poretsky | |||

Avici Systems | Quarry Technologies | |||

June 2003 | Brent Imhoff | |||

Wiltel Communications | ||||

October 2003 | ||||

Terminology for Benchmarking | Terminology for Benchmarking | |||

IGP Data Plane Route Convergence | IGP Data Plane Route Convergence | |||

<draft-ietf-bmwg-igp-dataplane-conv-term-00.txt> | <draft-ietf-bmwg-igp-dataplane-conv-term-01.txt> | |||

Status of this Memo | Status of this Memo | |||

This document is an Internet-Draft and is in full conformance with | This document is an Internet-Draft and is in full conformance with | |||

all provisions of Section 10 of RFC2026. | all provisions of Section 10 of RFC2026. | |||

Internet-Drafts are working documents of the Internet Engineering | Internet-Drafts are working documents of the Internet Engineering | |||

Task Force (IETF), its areas, and its working groups. Note that | Task Force (IETF), its areas, and its working groups. Note that | |||

other groups may also distribute working documents as Internet- | other groups may also distribute working documents as Internet- | |||

Drafts. | Drafts. | |||

skipping to change at page 1, line 41 | skipping to change at page 1, line 44 | |||

The list of current Internet-Drafts can be accessed at | The list of current Internet-Drafts can be accessed at | |||

http://www.ietf.org/ietf/1id-abstracts.txt | http://www.ietf.org/ietf/1id-abstracts.txt | |||

The list of Internet-Draft Shadow Directories can be accessed at | The list of Internet-Draft Shadow Directories can be accessed at | |||

http://www.ietf.org/shadow.html. | http://www.ietf.org/shadow.html. | |||

Table of Contents | Table of Contents | |||

1. Introduction ...............................................2 | 1. Introduction ...............................................2 | |||

2. Existing definitions .......................................2 | 2. Existing definitions .......................................2 | |||

3. Term definitions............................................2 | 3. Term definitions............................................3 | |||

3.1 Network Convergence.....................................2 | 3.1 Network Convergence.......................................3 | |||

3.2 Protocol Convergence....................................3 | 3.2 Protocol Convergence......................................3 | |||

3.3 Route Convergence.......................................3 | 3.3 Route Convergence.........................................4 | |||

3.4 Full Route Convergence Time.............................4 | 3.4 Convergence Event.........................................4 | |||

3.5 Route Convergence Packet Loss...........................5 | 3.5 Full Convergence..........................................4 | |||

3.6 Average Route Convergence Time..........................5 | 3.6 Convergence Packet Loss...................................5 | |||

3.7 Route Convergence Event Slope...........................6 | 3.7 Convergence Event Instant.................................5 | |||

3.8 Route Convergence Recovery Slope........................6 | 3.8 Convergence Recovery Transition...........................6 | |||

3.9 Reroute Convergence Time...............................7 | 3.9 Rate-Derived Convergence Time.............................6 | |||

3.10 Local Interface........................................7 | 3.10 Convergence Recovery Instant.............................7 | |||

3.11 Neighbor Interface.....................................8 | 3.11 Convergence Event Transition.............................7 | |||

3.12 Remote Interface.......................................8 | 3.12 Loss-Derived Convergence Time............................8 | |||

4. Security Considerations.....................................8 | IGP Data Plane Route Convergence | |||

5. References..................................................9 | ||||

IGP Route Convergence | ||||

7. Author's Address............................................9 | 3.13 Route Convergence Time...................................9 | |||

8. Full Copyright Statement....................................9 | 3.14 Restoration Convergence Time.............................9 | |||

3.15 Packet Sampling Interval.................................10 | ||||

3.16 Local Interface..........................................10 | ||||

3.17 Neighbor Interface.......................................10 | ||||

3.18 Remote Interface.........................................11 | ||||

3.19 Preferred Egress Interface...............................11 | ||||

3.20 Next-Best Egress Interface...............................12 | ||||

4. Security Considerations.....................................12 | ||||

5. References..................................................12 | ||||

6. Author's Address............................................12 | ||||

7. Full Copyright Statement....................................13 | ||||

1. Introduction | 1. Introduction | |||

This draft describes the terminology for benchmarking IGP Route | This draft describes the terminology for benchmarking IGP Route | |||

Convergence. The motivation and applicability for this | Convergence. The motivation and applicability for this | |||

benchmarking is provided in [1]. The methodology to be used for | benchmarking is provided in [1]. The methodology to be used for | |||

this benchmarking is described in [2]. The methodology and | this benchmarking is described in [2]. The methodology and | |||

terminology to be used for benchmarking route convergence can be | terminology to be used for benchmarking route convergence can be | |||

applied to any link-state IGP such as ISIS [3] and OSPF [4]. The | applied to any link-state IGP such as ISIS [3] and OSPF [4]. The | |||

data plane is measured to obtain the convergence benchmarking metrics. | data plane is measured to obtain black-box (externally observable) | |||

The purpose of this document is to introduce new terms required to | convergence benchmarking metrics. The purpose of this document is | |||

complete execution of the IGP Route Convergence Methodology [2]. | to introduce new terms required to complete execution of the IGP | |||

Route Convergence Methodology [2]. | ||||

2. Existing definitions | An example of Route Convergence as observed and measured from the | |||

data plane is shown in Figure 1. The graph in Figure 1 shows | ||||

Forwarding Rate versus Time. Time 0 on the X-axis is on the far | ||||

right of the graph. The components of the graph and metrics are | ||||

defined in the Term Definitions section of this document. | ||||

Recovery Convergence Event Time = 0sec | ||||

Maximum ^ ^ ^ | ||||

Forwarding Rate--> ----\ Packet /--------------- | ||||

\ Loss /<----Convergence | ||||

Convergence------->\ / Event Transition | ||||

Recovery Transition \ / | ||||

\_____/<------100% Packet Loss | ||||

X-axis = Time | ||||

Y-axis = Forwarding Rate | ||||

Figure 1. Convergence Graph | ||||

2. Existing definitions | ||||

For the sake of clarity and continuity this RFC adopts the template | For the sake of clarity and continuity this RFC adopts the template | |||

for definitions set out in Section 2 of RFC 1242. Definitions are | for definitions set out in Section 2 of RFC 1242. Definitions are | |||

indexed and grouped together in sections for ease of reference. | indexed and grouped together in sections for ease of reference. | |||

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", | The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", | |||

"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in | "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in | |||

this document are to be interpreted as described in RFC 2119. | this document are to be interpreted as described in RFC 2119. | |||

3. Term definitions | IGP Data Plane Route Convergence | |||

3. Term Definitions | ||||

3.1 Network Convergence | 3.1 Network Convergence | |||

Definition: | Definition: | |||

The completion of updating of all routing tables, including the | The completion of updating of all routing tables, including the | |||

FIB, in all routers throughout the network. | FIB, in all routers throughout the network. | |||

Discussion: | Discussion: | |||

Network Convergence can be approximated to the sum of Route | Network Convergence can be approximated to the sum of Route | |||

Convergence for all routers in the network. Network Convergence | Convergence for all routers in the network. Network Convergence | |||

can only be determined by the occurrence of packet loss or stale | can only be determined by the occurrence of packet loss or stale | |||

forwarding due to an out-of-date FIB. | forwarding due to an out-of-date FIB. | |||

Measurement Units: | Measurement Units: | |||

Converged or Not Converged | N/A | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Protocol Convergence | Protocol Convergence | |||

Route Convergence | Route Convergence | |||

IGP Data Plane Route Convergence | ||||

3.2 Protocol Convergence | 3.2 Protocol Convergence | |||

Definition: | Definition: | |||

The completion of updating a router's RIB and the forwarding of | The completion of updating a router's RIB and the forwarding of | |||

an route update message (LSA for OSPF/LSP for ISIS) to a | an route update message (LSA for OSPF/LSP for ISIS) to a | |||

neighboring peer. | neighboring peer. | |||

Discussion: | Discussion: | |||

Protocol Convergence considers only the Control Plane. IGP | Protocol Convergence considers only the Control Plane. IGP | |||

messaging is used to verify and measure convergence. Updating | messaging is used to verify and measure convergence. Updating | |||

of the FIB, hardware updating, rerouting of traffic, and packet | of the FIB, hardware updating, rerouting of traffic, and packet | |||

loss are not considered. | loss are not considered. | |||

Measurement Units: | Measurement Units: | |||

LSA/LSP Transmitted or LSA/LSP Not Transmitted. | N/A | |||

Issues: | Issues: | |||

Protocol Convergence does not consider updating of the FIB, | Protocol Convergence does not consider updating of the FIB, | |||

hardware updating, rerouting of traffic, and resultant packet | hardware updating, rerouting of traffic, and resulting packet | |||

loss. Protocol Convergence is only a partial measurement of | loss. Protocol Convergence is only a partial measurement of | |||

Route Convergence. | Route Convergence. | |||

See Also: | See Also: | |||

Network Convergence | Network Convergence | |||

Route Convergence | Route Convergence | |||

IGP Data Plane Route Convergence | ||||

3.3 Route Convergence | 3.3 Route Convergence | |||

Definition: | Definition: | |||

The completion of the router's FIB becoming fully converged. | The completion of the router's FIB becoming fully converged. | |||

Discussion: | Discussion: | |||

All components of the router have been updated with the most | Route Convergence is the action of all components of the router | |||

recent route change(s) including the RIB and FIB, along with | being updated with the most recent route change(s) including the | |||

software and hardware tables. Route Convergence can be observed | RIB and FIB, along with software and hardware tables. Route | |||

externally by the rerouting of data traffic. | Convergence can be observed externally by the rerouting of data | |||

Traffic to a new egress interface. | ||||

Measurement Units: | Measurement Units: | |||

Converged or Not Converged | N/A | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Route Convergence Time | ||||

Network Convergence | Network Convergence | |||

Protocol Convergence | Protocol Convergence | |||

IGP Data Plane Route Convergence | Full Convergence | |||

Convergence Event | ||||

3.4 Full Route Convergence Time | 3.4 Convergence Event | |||

Definition: | Definition: | |||

The amount of time it takes for Route Convergence to | The occurrence of a planned or unplanned action in the network | |||

complete as measured by the time to drop from maximum | that results in a change to an entry in the route table. | |||

forwarding rate and return to maximum forwarding rate | ||||

after occurrence of a network event. | ||||

Discussion: | Discussion: | |||

Full Route Convergence Time is a metric applied | Convergence Events include link loss, routing protocol session | |||

to a single router. Convergence Time could be calculated | loss, router failure, and better next-hop. | |||

from packet loss. However, this will give a better than | ||||

actual result when converging many routes simultaneously. | ||||

The preferred method to obtain Route Convergence Time is | ||||

to measure the time to drop from maximum forwarding rate | ||||

and return to maximum forwarding rate. | ||||

Figure 1 shows a graph model of Convergence Time as measured | Measurement Units: | |||

from the data plane. IGP Route Convergence Time is the | N/A | |||

amount of time for the Forwarding Rate to begin its downward | ||||

slope upon occurrence of a network event and then fully recover | ||||

to the Maximum Forwarding Rate. This is calculated as | ||||

(eq 1) Time(Convergence) = Time(Recovery) - Time(Network Event). | Issues: | |||

None | ||||

Forwarding Rate versus Time | See Also: | |||

Convergence Packet Loss | ||||

Convergence Event Instant | ||||

Time=Recovery Time=Network Event Time = 0sec | 3.5 Full Convergence | |||

Maximum ^ ^ ^ | ||||

Forwarding Rate--> ----\ /----------- | ||||

\ /<----Route Convergence | ||||

Route Convergence------->\ / Event Slope | ||||

Recovery Slope \_______/<------100% Packet Loss | ||||

X-axis = Time | Definition: | |||

Y-axis = Forwarding Rate | Route Convergence for an entire route table. | |||

Figure 1. Convergence Graph | Discussion: | |||

When benchmarking convergence it is useful to measure | ||||

The time to convergence an entire route table. For example, | ||||

IGP Data Plane Route Convergence | ||||

A Convergence Event can produced for an OSPF table of 5000 | ||||

routes so that the time to converge routes 1 through 5000 | ||||

is measured. | ||||

Measurement Units: | Measurement Units: | |||

seconds/milliseconds | N/A | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Network Convergence | ||||

Protocol Convergence | ||||

Route Convergence | Route Convergence | |||

Route Convergence Packet Loss | Convergence Event | |||

Average Route Convergence Time | ||||

IGP Data Plane Route Convergence | ||||

3.5 Route Convergence Packet Loss | 3.6 Convergence Packet Loss | |||

Definition: | Definition: | |||

The amount of packet loss until Route Convergence completes. | The amount of packet loss produced by a Convergence Event | |||

until Route Convergence occurs. | ||||

Discussion: | Discussion: | |||

Route Convergence Packet Loss is used to calculate the | Packet loss can be observed as a reduction of forwarded | |||

Route Convergence Time. Packet loss is an externally | traffic from the maximum forwarding rate. | |||

measurable metric. | ||||

Measurement Units: | Measurement Units: | |||

number of packets | number of packets | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Route Convergence | Route Convergence | |||

Full Route Convergence Time | Convergence Event | |||

Route Convergence Event Slope | Rate-Derived Convergence Time | |||

Route Convergence Recovery Slope | Loss-Derived Convergence Time | |||

3.6 Average Route Convergence Time | 3.7 Convergence Event Instant | |||

Definition: | ||||

The time instant that a Convergence Event occurs. | ||||

Discussion: | ||||

Convergence Event Instant is observable from the data | ||||

plane as the precise time that the device under test begins | ||||

to exhibit packet loss. | ||||

Measurement Units: | ||||

hh:mm:ss:uuu | ||||

IGP Data Plane Route Convergence | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Route Convergence | ||||

Convergence Event | ||||

Convergence Packet Loss | ||||

Convergence Recovery Instant | ||||

3.8 Convergence Recovery Instant | ||||

Definition: | ||||

The time instant that Route Convergence occurs. | ||||

Discussion: | ||||

Convergence Recovery Instant is observable from the data | ||||

plane as the precise time that the device under test no | ||||

longer exhibits packet loss. | ||||

Measurement Units: | ||||

hh:mm:ss:uuu | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Route Convergence | ||||

Convergence Packet Loss | ||||

Convergence Event Instant | ||||

3.9 Rate-Derived Convergence Time | ||||

Definition: | ||||

The amount of time for Convergence Packet Loss to | ||||

persist upon occurrence of a Convergence Event until | ||||

occurrence of Route Convergence. | ||||

Discussion: | ||||

Rate-Derived Convergence Time can be measured as the time | ||||

difference from the Convergence Event Instant to the | ||||

Convergence Reovery Instant, as shown with Equation 1. | ||||

(eq 1) Rate-Derived Convergence Time = | ||||

Convergence Recovery Instant - Convergence Event Instant. | ||||

Rate-Derived Convergence Time can be measured at the maximum | ||||

forwarding rate. | ||||

Measurement Units: | ||||

seconds/milliseconds | ||||

IGP Data Plane Route Convergence | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Route Convergence | ||||

Convergence Packet Loss | ||||

Loss-Derived Convergence Time | ||||

3.10 Loss-Derived Convergence Time | ||||

Definition: | Definition: | |||

The amount of time it takes for Route Convergence to | The amount of time it takes for Route Convergence to | |||

complete as calculated from the amount of packet loss | complete as calculated from the amount of packet loss | |||

and known forwarding rate. | and known forwarding rate. | |||

Discussion: | Discussion: | |||

Average Route Convergence Time is a metric applied to a | It can be calculated from packet loss that occurs due | |||

single router. It can be calculated from packet loss that | to a Convergence Event and Route Convergence, as shown | |||

occurs due to a network event and subsequent Route | with Equation 2. | |||

Convergence. | ||||

(eq 2) Loss-Derived Convergence Time = | ||||

Convergence Packets Loss / Forwarding Rate | ||||

NOTE: Units for this measurement are | ||||

packets / packets/second = seconds | ||||

Measurement Units: | Measurement Units: | |||

seconds/milliseconds | seconds/milliseconds | |||

Issues: | Issues: | |||

Use of Packet loss to calculate Route Convergence Time will | Loss-Derived Convergence time gives a better than | |||

give a better than actual result when converging many routes | actual result when converging many routes simultaneously. | |||

simultaneously. Full Route Convergence Time is | Because of this the preferred reporting metric in most | |||

the preferred benchmark for IGP Route Convergence. | Cases is Rate-Derived Convergence Time. | |||

See Also: | See Also: | |||

Route Convergence | Route Convergence | |||

Route Convergence Packet Loss | Convergence Packet Loss | |||

Full Route Convergence Time | Rate-Derived Convergence Time | |||

Route Convergence Event Slope | Convergence Event Transition | |||

Route Convergence Recovery Slope | Convergence Recovery Transition | |||

IGP Data Plane Route Convergence | ||||

3.7 Route Convergence Event Slope | 3.11 Convergence Event Transition | |||

Definition: | Definition: | |||

The characteristic of routers in which forwarding rate | The characteristic of A router in which forwarding rate | |||

gradually reaches zero as output queues drain after a | gradually reaches zero as output queues drain after a | |||

network event. | network event. | |||

IGP Data Plane Route Convergence | ||||

Discussion: | Discussion: | |||

Route Convergence Event Slope is externally observable. | Rate-Derived Convergence Time ignores the Convergence Event | |||

Full Route Convergence Time ignores the Route | Transition. Loss-Derived Convergence Time based upon the amount | |||

Convergence Event Slope. Average Route Convergence | of packet loss takes the Convergence Event Transition into | |||

Time based upon the amount of packet loss takes the | account. The Convergence Event Transition is best observed for | |||

Route Convergence Event Slope into account. | Full Convergence. | |||

Measurement Units: | Measurement Units: | |||

seconds/milliseconds | seconds/milliseconds | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Route Convergence | Route Convergence | |||

Full Route Convergence Time | ||||

Average Route Convergence Time | ||||

Route Convergence Packet Loss | ||||

Route Convergence Recovery Slope | ||||

3.8 Route Convergence Recovery Slope | Convergence Event | |||

Rate-Derived Convergence Time | ||||

Loss-Derived Convergence Time | ||||

Convergence Packet Loss | ||||

Convergence Recovery Transition | ||||

3.12 Convergence Recovery Transition | ||||

Definition: | Definition: | |||

The characteristic of routers in which forwarding rate | The characteristic of a router in which forwarding rate | |||

gradually rises to the maximum value as many routes | gradually rises to the maximum value as many routes | |||

converge to recover from a network event. | converge to recover from a network event. | |||

Discussion: | Discussion: | |||

Route Convergence Recovery Slope is externally observable. | Rate-Derived Convergence Time ignores the Route | |||

Full Route Convergence Time ignores the Route | Convergence Recovery Transition. Loss-Derived Convergence | |||

Convergence Recovery Slope. Average Route Convergence | ||||

Time based upon the amount of packet loss takes the | Time based upon the amount of packet loss takes the | |||

Route Convergence Recovery Slope into account. | Convergence Recovery Transition into account. The | |||

Convergence Recovery Transition is best observed for Full | ||||

Convergence. | ||||

Measurement Units: | Measurement Units: | |||

seconds/milliseconds | seconds/milliseconds | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Route Convergence | Route Convergence | |||

Full Route Convergence Time | Rate-Derived Convergence Time | |||

Average Route Convergence Time | Loss-Derived Convergence Time | |||

Route Convergence Packet Loss | Convergence Packet Loss | |||

Route Convergence Event Slope | Convergence Event Transition | |||

IGP Data Plane Route Convergence | IGP Data Plane Route Convergence | |||

3.9 Reroute Convergence Time | 3.13 Route Convergence Time | |||

Definition: | Definition: | |||

The amount of time it takes for Route Convergence to | The amount of time it takes for Route Convergence to | |||

complete as observed from rerouting of traffic to a | complete as observed from rerouting traffic to a | |||

new egress interface. | new egress interface due to a change in next-hop without | |||

packet loss. | ||||

Discussion: | Discussion: | |||

Reroute Convergence Time is the IGP Route Convergence | Route Convergence Time is the IGP Route Convergence | |||

benchmark to be used for network events that produce | benchmark to be used for network events that produce | |||

a change in next-hop without packet loss. An example | a change in next-hop without packet loss. | |||

of this is a cost change in which an backup path becomes | ||||

the preferred path. | ||||

Measurement Units: | Measurement Units: | |||

seconds/milliseconds | seconds/milliseconds | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Route Convergence | Route Convergence | |||

Full Route Convergence Time | Rate-Derived Convergence Time | |||

Average Route Convergence Time | Loss-Derived Convergence Time | |||

3.14 Restoration Convergence Time | ||||

Definition: | ||||

The amount of time for the router under test to restore | ||||

traffic to the original outbound port after recovery from | ||||

a Convergence Event. | ||||

Discussion: | ||||

Restoration Convergence Time is the amount of time to | ||||

Converge back to the original outbound port. This is achieved | ||||

by recovering from the Convergence Event, such as restoring | ||||

the failed link. Restoration Convergence Time is measured | ||||

using the Rate-Derived Convergence Time calculation technique, | ||||

as provided in Equation 1. It is possible, but not desired | ||||

to have the Restoration Convergence Time differ from the | ||||

Rate-Derived Convergence Time. | ||||

Measurement Units: | ||||

seconds or milliseconds | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Convergence Event | ||||

Rate-Derived Convegence Time | ||||

IGP Data Plane Route Convergence | ||||

3.15 Packet Sampling Interval | ||||

Definition: | ||||

The rate at which the tester (test equipment) polls to make | ||||

measurements for arriving packet flows. | ||||

Discussion: | ||||

Metrics measured at the Packet Sampling Interval include | ||||

packets received and Convergence Packet Loss. | ||||

Measurement Units: | ||||

seconds or milliseconds | ||||

Issues: | ||||

Packet Sampling Interval can influence the Convergence Graph. | ||||

This is particularly true as Full Convergence less than 1 second | ||||

is achieved. The Convergence Event Transition and Convergence | ||||

Recovery Transition can become exaggerated when the Packet | ||||

Sampling Interval is too long. This will produce a larger than | ||||

actual Rate-Derived Convergence Time. Guidelines for use of | ||||

the Packet Sampling Interval are provided in [2]. | ||||

See Also: | ||||

Convergence Packet Loss | ||||

Convergence Event Transition | ||||

Convergence Recovery Transition | ||||

3.16 Local Interface | ||||

3.10 Local Interface | ||||

Definition: | Definition: | |||

An interface on the DUT. | An interface on the DUT. | |||

Discussion: | Discussion: | |||

None | None | |||

Measurement Units: | Measurement Units: | |||

N/A | N/A | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Neighbor Interface | Neighbor Interface | |||

Remote interface | Remote interface | |||

3.11 Neighbor Interface | 3.17 Neighbor Interface | |||

Definition: | Definition: | |||

The interface on the neighbor router or tester that is | The interface on the neighbor router or tester that is | |||

directly linked to the DUT's Local Interface. | directly linked to the DUT's Local Interface. | |||

Discussion: | Discussion: | |||

None | None | |||

IGP Data Plane Route Convergence | ||||

Measurement Units: | Measurement Units: | |||

N/A | N/A | |||

IGP Data Plane Route Convergence | ||||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Local Interface | Local Interface | |||

Remote interface | Remote interface | |||

3.12 Remote Interface | 3.18 Remote Interface | |||

Definition: | Definition: | |||

An interface on a neighboring router that is not directly | An interface on a neighboring router that is not directly | |||

linked to any interface on the DUT. | linked to any interface on the DUT. | |||

Discussion: | Discussion: | |||

None | None | |||

Measurement Units: | Measurement Units: | |||

N/A | N/A | |||

Issues: | Issues: | |||

None | None | |||

See Also: | See Also: | |||

Local interface | Local interface | |||

Neighbor Interface | Neighbor Interface | |||

3.19 Preferred Egress Interface | ||||

Definition: | ||||

The outbound interface on DUT to the preferred next-hop. | ||||

Discussion: | ||||

Preferred Egress Interface is the egress interface prior to | ||||

a Convergence Event | ||||

Measurement Units: | ||||

N/A | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Next-Best Egress Interface | ||||

Convergence Event | ||||

IGP Data Plane Route Convergence | ||||

3.20 Next-Best Egress Interface | ||||

Definition: | ||||

The outbound interface on DUT to the second-best next-hop. | ||||

Discussion: | ||||

Next-Best Egress Interface is the egress interface after to | ||||

a Convergence Event | ||||

Measurement Units: | ||||

N/A | ||||

Issues: | ||||

None | ||||

See Also: | ||||

Preferred Egress Interface | ||||

Convergence Event | ||||

4. Security Considerations | 4. Security Considerations | |||

Documents of this type do not directly effect the security of | Documents of this type do not directly effect the security of | |||

the Internet or of corporate networks as long as benchmarking | the Internet or of corporate networks as long as benchmarking | |||

is not performed on devices or systems connected to operating | is not performed on devices or systems connected to operating | |||

networks. | networks. | |||

5. References | 5. References | |||

[1] Poretsky, S., "Benchmarking Applicability for IGP Data Plane | [1] Poretsky, S., "Benchmarking Applicability for IGP Data Plane | |||

Route Convergence", draft-ietf-bmwg-igp-dataplane-conv-app-00, | Route Convergence", draft-ietf-bmwg-igp-dataplane-conv-app-01, | |||

work in progress, June 2003. | work in progress, October 2003. | |||

[2] Poretsky, S., "Benchmarking Terminology for IGP Data Plane | [2] Poretsky, S., "Benchmarking Methodology for IGP Data Plane | |||

Route Convergence", draft-ietf-bmwg-igp-dataplane-conv-term-00, | Route Convergence", draft-ietf-bmwg-igp-dataplane-conv-meth-01, | |||

work in progress, June 2003. | work in progress, October 2003. | |||

[3] Callon, R., "Use of OSI IS-IS for Routing in TCP/IP and Dual | [3] Callon, R., "Use of OSI IS-IS for Routing in TCP/IP and Dual | |||

Environments", RFC 1195, December 1990. | Environments", RFC 1195, December 1990. | |||

[4] Moy, J., "OSPF Version 2", RFC 2328, IETF, April 1998. | [4] Moy, J., "OSPF Version 2", RFC 2328, IETF, April 1998. | |||

IGP Data Plane Route Convergence | ||||

6. Author's Address | 6. Author's Address | |||

Scott Poretsky | Scott Poretsky | |||

Avici Systems | Quarry Technologies | |||

101 Billerica Avenue | 8 New England Executive Park | |||

N. Billerica, MA 01862 | Burlington, MA 01803 | |||

USA | USA | |||

Phone: + 1 781 395 5090 | ||||

EMail: sporetsky@quarrytech.com | ||||

IGP Data Plane Route Convergence | ||||

Phone: + 1 978 964 2287 | Brent Imhoff | |||

EMail: sporetsky@avici.com | WilTel Communications | |||

3180 Rider Trail South | ||||

Bridgeton, MO 63045 USA | ||||

Phone: +1 314 595 6853 | ||||

EMail: brent.imhoff@wcg.com | ||||

7. Full Copyright Statement | 7. Full Copyright Statement | |||

Copyright (C) The Internet Society (1998). All Rights | Copyright (C) The Internet Society (1998). All Rights | |||

Reserved. | Reserved. | |||

This document and translations of it may be copied and | This document and translations of it may be copied and | |||

furnished to others, and derivative works that comment on or | furnished to others, and derivative works that comment on or | |||

otherwise explain it or assist in its implementation may be | otherwise explain it or assist in its implementation may be | |||

prepared, copied, published and distributed, in whole or in | prepared, copied, published and distributed, in whole or in | |||

End of changes. | ||||

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