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Loopback interface on 93xx switches

Domenico Viggiani
Super Advisor

Loopback interface on 93xx switches

I read that configuring a loopback interface on a router device is a good practice (it will be "always" up, there will be a unique source IP for SNMP traps, for sFlow samples, etc).
On my HP 93xx routing switches I have:
- many VLANs and virtual interfaces
- OSPF routing protocol
What's the best way to configure a loopback interface?

Thanks
2 REPLIES
Jasdev Singh
Esteemed Contributor

Re: Loopback interface on 93xx switches

Domenico Viggiani
Super Advisor

Re: Loopback interface on 93xx switches

No, it doesn't solve my problem.
I have a quite classical configuration with many VLANs and many correspondent virtual interfaces:
...
vlan 3 name SERVER by port
tagged ethe 1/1 to 1/8 ethe 2/1 to 2/7
untagged ethe 2/8
router-interface ve 3
spanning-tree
vlan 4 name NET by port
tagged ethe 1/1 to 1/8 ethe 2/1 to 2/7
router-interface ve 4
spanning-tree
...
router ospf
area 0
default-information-originate
redistribution connected
...
interface ve 3
ip address xxx.yyy.64.zzz 255.255.255.128
ip vrrp-extended vrid 2
backup
ip-address xxx.yyy.zzz.126
enable
interface ve 4
ip address 10.101.1.2 255.255.255.0
ip ospf area 0
ip vrrp-extended vrid 3
backup
ip-address 10.101.1.1
enable

but actually I have no Loopback interface.
For management pourposes, I use vlan4.

Many people suggest a loopback interface to use as single source IP. Is it correct?
How can I configure and route it?