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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring IP Unicast Routing
Configuring ISO CLNS Routing
These sections briefly describes how to configure IS-IS routing.
• Default IS-IS Configuration, page 1-68
• Enabling IS-IS Routing, page 1-69
• Configuring IS-IS Global Parameters, page 1-71
• Configuring IS-IS Interface Parameters, page 1-73
Default IS-IS Configuration
Table 1-12 Default IS-IS Configuration
Feature Default Setting
Ignore link-state PDU (LSP) errors Enabled.
IS-IS type Conventional IS-IS: the router acts as both a Level 1 (station) and a Level 2
(area) router.
Multiarea IS-IS: the first instance of the IS-IS routing process is a Level 1-2
router. Remaining instances are Level 1 routers.
Default-information originate Disabled.
Log IS-IS adjacency state changes. Disabled.
LSP generation throttling timers Maximum interval between two consecutive occurrences: 5 seconds.
Initial LSP generation delay: 50 ms.
Hold time between the first and second LSP generation: 5000 ms.
LSP maximum lifetime (without a refresh) 1200 seconds (20 minutes) before t.he LSP packet is deleted.
LSP refresh interval Send LSP refreshes every 900 seconds (15 minutes).
Maximum LSP packet size 1497 bytes.
NSF Awareness
1
1. NSF = Nonstop Forwarding
Enabled
2
. Allows Layer 3 switches to continue forwarding packets from a
neighboring NSF-capable router during hardware or software changes.
2. IS-IS NSF awareness is enabled for IPv4 on switches running Cisco IOS Release 12.2(25)SEG or later.
Partial route computation (PRC) throttling
timers
Maximum PRC wait interval: 5 seconds.
Initial PRC calculation delay after a topology change: 2000 ms.
Hold time between the first and second PRC calculation: 5000 ms.
Partition avoidance Disabled.
Password No area or domain password is defined, and authentication is disabled.
Set-overload-bit Disabled. When enabled, if no arguments are entered, the overload bit is set
immediately and remains set until you enter the no set-overload-bit command.
Shortest path first (SPF) throttling timers Maximum interval between consecutive SFPs: 10 seconds.
Initial SFP calculation after a topology change: 5500 ms.
Holdtime between the first and second SFP calculation: 5500 ms.
Summary-address Disabled.
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