140
Step Command
Remarks
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Configure a DIS priority for
the interface.
isis dis-priority
value
[
level-1
|
level-2
]
The default setting is 64.
Enabling source address check for hello packets on a PPP
interface
An IS-IS PPP interface can have a peer on a different network. Perform this task to configure an IS-IS PPP
interface to establish neighbor relationship only with a peer on the same network.
To enable source address check for hello packets on a PPP interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Enable source address
check for hello packets on
a PPP interface.
isis peer-ip-check
By default, an IS-IS PPP interface can
have a peer on a different network.
The command applies only to PPP
interfaces.
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. This can save
bandwidth and CPU resources, and ensures that 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
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.
