1-29
To do…
Use the command...
Remarks
Enter system view
system-view
––
Enter IS-IS view
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
––
Configure the SPF
calculation interval
timer spf maximum-interval
[
initial-interval
[
second-wait-interval
] ]
Optional
The default SPF calculation
interval is 10 seconds.
Setting the LSDB Overload Bit
By setting the overload bit in sent LSPs, a router informs other routers of a failure that makes it
incapable of routing and forwarding packets.
When an IS-IS router cannot record the complete LSDP due to running out of memory or some other
reasons, it will calculate wrong routes. To make troubleshooting easier in this case, you can temporarily
isolate the router from the IS-IS network by setting the overload bit.
Follow these steps to set the LSDB overload bit:
To do…
Use the command…
Remarks
Enter system view
system-view
––
Enter IS-IS view
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
––
Set the overload bit
set-overload
[
on-startup
[ [
start-from-nbr
system-id
[
timeout1
[
nbr-timeout
] ] ] |
timeout2
]
[
allow
{
interlevel
|
external
} * ]
Required
Not set by
default
Configuring IS-IS Authentication
Configuration Prerequisites
Complete the following tasks before this configuration:
z
Configure network layer addresses for interfaces to make neighboring nodes accessible to each
other at the network layer.
z
Enable IS-IS.
Configuring Neighbor Relationship Authentication
With neighbor relationship authentication configured, an interface adds the password in the specified
mode into hello packets to the peer and checks the password in the received hello packets. If the
authentication succeeds, it forms the neighbor relationship with the peer.
The authentication mode and password at both ends must be identical.
