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Virtual Links in ISIS

Virtual Links in ISIS

Created: Aug 26, 2021 13:40:31Latest reply: Aug 27, 2021 04:41:37 347 5 0 0 0
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Does ISIS supports virtual links or not?

ISISVirtual Link

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jason_hu
Admin Created Aug 26, 2021 13:54:34

Hi friend!

ISIS does not support virtual links, OSPF supports virtual links.

Hope to help you!
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Nino_Chou
Nino_Chou Admin Created Aug 26, 2021 13:41:03

Hello, friend!
It's nice to meet you in the community.
We're working on getting the right answer for you.
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jason_hu
jason_hu Admin Created Aug 26, 2021 13:54:34

Hi friend!

ISIS does not support virtual links, OSPF supports virtual links.

Hope to help you!
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andersoncf1
andersoncf1 MVE Author Created Aug 26, 2021 14:33:23

Hi friend,

Unfortunately ISIS does not support it.

I suggest take a look at this OSPF setup with virtual link:

https://support.huawei.com/enterprise/en/doc/EDOC1000141900/3efbf737/example-for-configuring-an-ospf-virtual-link

I hope to help!  Virtual Links in ISIS-4104815-1

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user_3134129
user_3134129 Created Aug 26, 2021 14:45:41

ISIS have no backbone area and mandatory connection to special area. So virtual links is unnecessory
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SalmanSaeed
SalmanSaeed Created Aug 27, 2021 04:41:37

Hi!
IS-IS is not strict on the areas but has some decent rules defined for connecting areas.
OSPF however, has a tough hierarchical that needs to be followed for establishing connectivity between areas. On the brighter side, that same toughness is used to avoid loops in OSPF.
There are no virtual-links in IS-IS, if you can explain the topology then maybe we can share a way around for that as well.
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