Routing protocol between two devices connected in vpc to a nexus 9k switch

[rohandec1980]

Hi Guys

I have a query on routing between devices connected to a nexus switch.

Physical topology:

• There is an active firewall and two WAN routers in the active data centre.
• There is a standby firewall and a single WAN router in the standby data centre.
• The firewalls and wan routers connect to the nexus switches in their data centre.

Logical topology:

• The links between the firewall and the nexus switches are layer -2
• The links between the wan routers and the nexus switches are layer -2.
• The firewall will run svi with ospf configuration
• The WAN routers use sub-interfaces to configure the ospf configuration
• Vpc only being used for layer -2 redundancy
• The Nexus switches see the dot1q tagged for the vlans being used for this connectivity. There may be SVIs for other vlans which are not part of this connectivity.

Query:

• Can OSPF peering be created in this fashion between the firewall and 3 routers across both sites?

Regards

Rohan

[Sergiu.Daniluk · Accepted solution]

Hi,

If the Nexus 9K switches are used just as L2 for the OSPF vlan, then yes, OSPF neighborship as you mentioned will come up.

You can refer to this document for supported typologies for routing over vPC: https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/118997-technote-nexus-00.html 

Regards,

Sergiu