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Ste
Command
Remarks
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Disable the interface from
sending and receiving IS-IS
packets.
isis silent
By default, the interface can send
and receive IS-IS packets.
Enabling an interface to send small hello packets
IS-IS messages cannot be fragmented at the IP layer because they are directly encapsulated in frames.
Any two IS-IS neighboring routers must negotiate a common MTU. To avoid sending big hellos to save
bandwidth, enable the interface to send small hello packets without CLVs.
To enable an interface to send small hello packets:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the interface to send
small hello packets without
CLVs.
isis small-hello
By default, the interface can send
standard hello packets.
Configuring LSP parameters
Configuring LSP timers
1. Specify the maximum age of LSPs.
Each LSP has an age that decreases in the LSDB. Any LSP with an age of 0 is deleted from the LSDB.
You can adjust the age value based on the scale of a network.
To specify the maximum age of LSPs:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Specify the maximum LSP
age.
timer lsp-max-age seconds
The default setting is 1200
seconds.
2. Specify the LSP refresh interval and generation interval.
Each router needs to refresh its LSPs at a configurable interval and send them to other routers to
prevent valid routes from aging out. A smaller refresh interval speeds up network convergence but
consumes more bandwidth.
When the network topology changes, for example, a neighbor is down or up, or the interface
metric, system ID, or area ID is changed, the router generates an LSP after a configurable interval.
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