How To Configure Is-Is Routing - Cisco Catalyst 9500 series Configuration Manual

Configuring IP Unicast Routing
• Designated router election priority, which allows you to reduce the number of adjacencies required on
• The interface circuit type, which is the type of adjacency desired for neighbors on the specified interface
• Password authentication for the interface

How to Configure IS-IS Routing

Default IS-IS Configuration
Table 16: Default IS-IS Configuration
Feature
Ignore link-state PDU (LSP) errors
IS-IS type
Default-information originate
Log IS-IS adjacency state changes.
LSP generation throttling timers
LSP maximum lifetime (without a
refresh)
LSP refresh interval
Maximum LSP packet size
◦ Complete sequence number PDU (CSNP) interval. CSNPs are sent by the designated router to
maintain database synchronization
◦ Retransmission interval. This is the time between retransmission of IS-IS LSPs for point-to-point
links.
◦ IS-IS LSP retransmission throttle interval. This is the maximum rate (number of milliseconds
between packets) at which IS-IS LSPs are re-sent on point-to-point links This interval is different
from the retransmission interval, which is the time between successive retransmissions of the same
LSP
a multiaccess network, which in turn reduces the amount of routing protocol traffic and the size of the
topology database.
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
Default Setting
Enabled.
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.
Disabled.
Disabled.
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.
1200 seconds (20 minutes) before t.he LSP packet is deleted.
Send LSP refreshes every 900 seconds (15 minutes).
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How to Configure IS-IS Routing
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