Disabling An Interface From Sending/Receiving Is-Is Packets; Disabling Hello Source Address Check For A Ppp Interface; Enabling An Interface To Send Small Hello Packets - HPE FlexNetwork HSR6800 Configuration Manual

Step
Enter system view.
1.
Enter interface view.
2.
Specify a DIS priority for the
3.
interface.

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 other routers know networks
directly connected to the interface.
To disable an interface from sending and receiving IS-IS packets:
Step
Enter system view.
1.
Enter interface view.
2.
Disable the interface from
3.
sending and receiving IS-IS
packets.

Disabling hello source address check for a PPP interface

On a P2P link, IS-IS verifies the source IP address of the incoming hello packets is in the same
network segment as the IP address of the receiving interface. If not, it discards the hello packets, and
no neighbor relationship can be established with the peer router.
If a PPP interface's peer IP address is on a different network segment, disable the hello source
address check for the PPP interface to establish the neighbor relationship with the peer.
To enable neighbor relationships over different network segments:
Step
Enter system view.
1.
Enter interface view.
2.
Disable hello source
3.
address check for the
PPP interface.

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. Any two IS-IS neighboring routers must negotiate a common MTU. To avoid sending big
hellos for saving bandwidth, enable the interface to send small hello packets without CLVs.
Command
system-view
interface interface-type
interface-number
isis dis-priority value [ level-1 |
level-2 ]
Command
system-view
interface interface-type
interface-number
isis silent
Command
system-view
interface interface-type
interface-number
isis peer-ip-ignore
141
Remarks
N/A
N/A
Optional.
64 by default.
Remarks
N/A
N/A
Not disabled by default.
Remarks
N/A
N/A
The command only applies to the
PPP interface.
By default, hello source address
check is enabled.