topic Re: Change OSPF RouterID without remove config . Available options. in General Topics

Change OSPF RouterID without remove config . Available options.

maller2 — Tue, 06 Aug 2024 16:34:03 GMT

We have a cluster running ospf working fine for years . This cluster has been upgraded several times from R80.10 to R81.20 .

Now , we have to configure new interfaces with ospf and we've found that OSPF RouterID is missing from configuration , I'm not sure how it is.

Now when we try to add an interface , we get this message :

FKR01FWK> set ospf instance default interface bond0.2108 area 0.0.6.1 on
RTGRTG0019 OSPFv2: No Global Router ID configured. Please configure the same Global Router ID on all cluster members. If OSPF is already configured, first remove the configuration.

Then , which options do I have to solve it? Remove all ospf config and rewrite again fixing the OSPF RouterID?

Any other option?

thanks

Manel

Re: Change OSPF RouterID without remove config . Available options.

the_rock — Tue, 06 Aug 2024 16:44:31 GMT

Can you send output of show ospf summary from clish please?

Andy

Re: Change OSPF RouterID without remove config . Available options.

Chris_Atkinson — Wed, 07 Aug 2024 01:54:08 GMT

There is a process available from TAC involving dbset commands if the OSPF config is extensive and would be problematic to remove/reapply just to change the router-ID for OSPF.

Being a cluster obviously you should start on the standby member first with any changes then failover to minimize any downtime.

Re: Change OSPF RouterID without remove config . Available options.

maller2 — Wed, 07 Aug 2024 06:40:32 GMT

show ospf summary

--------------------------- OSPF Instance default -----------------------------

SPF schedule delay: 2 secs
Hold time between two SPFs: 5 secs
Number of Areas in this router: 1
Normal: 0 Stub: 1 NSSA: 0
RFC1583 compability mode is on
Number of Virtual Links in this router: 0
Number of UpEvents: 5 Number of DownEvents: 0
Default ASE Cost: 1
Default ASE Type: 1

Area: 0.0.6.1

Number of Interfaces in this area: 5
It is a stub area
Cost for default stub area route: 1
Number of ABRs: 1 Number of ASBRs: 0
Number of times SPF Algorithm executed: 5
No Area Ranges Configured
No Area Stubnets Configured

> show ospf router-id
---------------------------- OSPF Instance default -----------------------------

Router ID: 10.202.97.132 <-- THIS IS AN AUTOMATIC ROUTER ID