3Com Switch 7750 Configuration Guide Guide

IS-IS Basic Configuration 325
Configuring the LSP sending interval
LSPs are used to advertise link state records within an area.
Configuring the LSP retransmitting interval on an interface
On a point-to-point link, if there is no response for the sent LSP, the LSP is
considered lost or discarded and the sending router retransmits the LSP.
Configuring the number of Hello packets expected from the remote router
before it is considered dead
In IS-IS, Hello packets are sent and received to maintain router neighbor
relationships. If a router does not receive any Hello packet from a neighboring
router in a certain period of time (Holddown time in IS-IS), the neighbor is
considered dead.
In IS-IS, you can adjust the Holddown time by configuring the number of Hello
packets expected from a neighbor router before it is considered dead.
Configure the CSNP packets
sending interval, in seconds
isis timer csnp seconds [
level-1 | level-2 ]
Optional
The default CSNP packets
sending interval is 10 seconds.
Table 252 Configure the LSP sending interval
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Configure the LSP sending
interval, in milliseconds
isis timer lsp time
Optional
The default LSP sending
interval is 33 milliseconds.
Table 253 Configure LSP retransmitting interval
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Configure the LSP
retransmitting interval on a
point-to-point link<
isis timer retransmit
seconds
Optional
By default, LSPs are
retransmitted on a
point-to-point link every five
seconds.
Table 254 Configure the number of Hello packets expected from the remote router
before it is considered dead
Operation Command Description
Enter system view system-view -
Table 251 Configure the CSNP packets sending interval
Operation Command Description