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Document ID: 13784
Questions
Introduction
If custom queuing has been configured, do routing protocol updates such as Link-State Advertisements (LSAs) for Open Shortest Path First (OSPF) and broadcasts for Routing Information Protocol (RIP) and Interior Gateway Routing Protocol (IGRP) get queued in the special system queue 0, or do they get queued in the IP queue?
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Introduction
This document provides information to answer a question about custom queuing and routing updates.
Q. If custom queuing has been configured, do routing protocol updates such as Link-State Advertisements (LSAs) for Open Shortest Path First (OSPF) and broadcasts for Routing Information Protocol (RIP) and Interior Gateway Routing Protocol (IGRP) get queued in the special system queue 0, or do they get queued in the IP queue?
A. In addition to low level keepalives, some protocols -- whose traffic is originated by the router -- use queue 0 for their time critical packets. Specifically:
ISO IGRP hellos
ESIS hellos
ISIS hellos
DECnet hellos
SLARP address resolution
EIGRP hellos
OSPF hellos
Router syslog messages
Spanning tree keepalives
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| Updated: Aug 10, 2005 | Document ID: 13784 |