H3C Technologies H3C S12500 Series Switches - Manual (Page 171)

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Step Command Remarks
3. Specify a DIS priority for the
interface. isis dis-priority value [ level-1 |
level-2 ] Optional.
64 by default.
Disabling an interface from sending/receiving IS-IS packets
After being disabled from sending and receiving hello packets, an interface cannot form any neighbor
relationship, but can advertise directly connected networks in LSPs through other interfaces. By doing so,
you can save bandwidth and CPU resources while ensuring other routers know networks directly
connected to the interface.
To disable an interface from sending and receiving IS-IS packets:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Disable the interface from
sending and receiving IS-IS
packets. isis silent Not disabled by default.
Enabling an interface to send small hello packets
IS-IS messages cannot be fragmented at the IP layer because they are directly encapsulated into frames.
Therefore, any two IS-IS neighboring routers must negotiate a common MTU. To avoid sending big hellos
for saving bandwidth, you can enable the interface to send small hello packets without CLVs.
To enable an interface to send small hello packets:
Step 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, standard hello packets
are sent.
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: