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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 42 Configuring IP Unicast Routing
Configuring ISO CLNS Routing
Step 9 set-overload-bit [on-startup
{seconds | wait-for-bgp}]
(Optional) Set an overload bit (a hippity bit) to allow other routers to ignore
the router in their shortest path first (SPF) calculations if the router is
having problems.
(Optional) on-startup—sets the overload bit only on startup. If
on-startup is not specified, the overload bit is set immediately and
remains set until you enter the no set-overload-bit command. If
on-startup is specified, you must enter a number of seconds or
wait-for-bgp.
seconds—When the on-startup keyword is configured, causes the
overload bit to be set upon system startup and remain set for this
number of seconds. The range is from 5 to 86400 seconds.
wait-for-bgp—When the on-startup keyword is configured, causes
the overload bit to be set upon system startup and remain set until BGP
has converged. If BGP does not signal IS-IS that it is converged, IS-IS
will turn off the overload bit after 10 minutes.
Step 10 lsp-refresh-interval seconds (Optional) Set an LSP refresh interval in seconds. The range is from 1 to
65535 seconds. The default is to send LSP refreshes every 900 seconds
(15 minutes).
Step 11 max-lsp-lifetime seconds (Optional) Set the maximum time that LSP packets remain in the router
database without being refreshed. The range is from 1 to 65535 seconds.
The default is 1200 seconds (20 minutes). After the specified time interval,
the LSP packet is deleted.
Step 12 lsp-gen-interval [level-1 | level-2]
lsp-max-wait [lsp-initial-wait
lsp-second-wait]
(Optional) Set the IS-IS LSP generation throttling timers:
lsp-max-wait—the maximum interval (in seconds) between two
consecutive occurrences of an LSP being generated. The range is 1 to
120, the default is 5.
lsp-initial-wait—the initial LSP generation delay (in milliseconds).
The range is 1 to 10000; the default is 50.
lsp-second-wait—the hold time between the first and second LSP
generation (in milliseconds). The range is 1 to 10000; the default is
5000.
Step 13 spf-interval [level-1 | level-2]
spf-max-wait [spf-initial-wait
spf-second-wait]
(Optional) Sets IS-IS shortest path first (SPF) throttling timers.
spf-max-wait—the maximum interval between consecutive SFPs (in
seconds). The range is 1 to 120, the default is 10.
spf-initial-wait—the initial SFP calculation after a topology change (in
milliseconds). The range is 1 to 10000; the default is 5500.
spf-second-wait—the holdtime between the first and second SFP
calculation (in milliseconds). The range is 1 to 10000; the default is
5500.
Command Purpose