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Auth VLAN on third party switch

wileong
Cisco Employee
Cisco Employee

Hi, 

 

Working on Brocade switch using Auth VLAN for Posture flow. Auth VLAN approach works fine in single PSN. How do we scale to multiple PSN using Auth VLAN?

When try to configure DHCP scope on both PSN1 and PSN2 using same IP segment but IP address assignment is unique there is an error.

 

dhcp configure existing.pngdhcp configure new.png

 

Error during saving DHCP scope. Any idea?

Thanks

Wing Churn

error dhcp.png

 

2 Accepted Solutions

Accepted Solutions

Jason Kunst
Cisco Employee
Cisco Employee
Its not supported to run same subnet on different PSNs. I assume for redundancy you’re doing this? I have heard this in the past would recommend you reach out via account team for a feature request

View solution in original post

If its different networks then open a tac case

View solution in original post

7 Replies 7

Jason Kunst
Cisco Employee
Cisco Employee
Its not supported to run same subnet on different PSNs. I assume for redundancy you’re doing this? I have heard this in the past would recommend you reach out via account team for a feature request

Hi Jason,

 

Understood on the redundancy is not available today. How about the error of creating none overlapping DHCP scope for the third screenshot i provided? The second scope i am creating is not overlapping with existing created scope, do we have any known bug on this. By the way, we are running ISE 2.2p9

 

Thanks

Wing Churn

It’s the same subnet correct? Regardles of nonverlapping status its not supported

Sorry, my attached image might be confusing but the DHCP scope is not overlapped.

It’s the same subnet. The network ID is the same therefore it won’t work. It doesn’t matter if you split the scope where 1 PSN serves part of the scope and the other part on another PSN (this works in Microsoft DHCP server but not on ISE design).

I think you are still misunderstood. Ignore those images, i am creating 2 totally different subnets and still get this error. Do we have any known issue around DHCP scope? If not, i will get partner to raise a TAC case.

If its different networks then open a tac case
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