Ethernet Fabric (VDX, CNA)

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Regular Visitor
Posts: 1
Registered: ‎10-16-2015
Accepted Solution

vdx 6740 nos 6.0.1 dhcp relay

- Two VDX 6740  in logical chassis mode

- NOS 6.0.1 and Fabric Virtual Gateway is in use (new since NOS 6.0.1)

- 23 VE interfaces with fabric virtual gateway on every VDX 

 

Problem:

The fabric loses the function of "ip dhcp relay" on this VE interfaces not immediatly but after few hours.

 

Temp. Solution:

 

conf t

rb 1

int ve 101

no ip dhcp relay

ip dhcp relay addr 192.168.100.83

rb 2

int ve 101

no ip dhcp relay

ip dhcp relay addr 192.168.100.83

 

 

 

and dhcp is ok immediatly

 

Please Help

 

New Contributor
Posts: 3
Registered: ‎02-10-2016

Re: vdx 6740 nos 6.0.1 dhcp relay

I'm seeing the same thing on 6.0.2.  Any chance you found a resolution for this?

 

 

Frequent Contributor
Posts: 95
Registered: ‎03-23-2015

Re: vdx 6740 nos 6.0.1 dhcp relay

[ Edited ]

Hi @screel,

 

I passed your question off to our support and it looks like you have a case open already. Can you let me know if the resolution the provided worked? If not, we'll go back to them for additional support.

 

TAC Engaged.png

 

Thanks!

Dennis Smith
Manager Brocade Communities
@DennisMSmith
New Contributor
Posts: 3
Registered: ‎11-24-2015

Re: vdx 6740 nos 6.0.1 dhcp relay

Hi,

 

What is the solution?

I'm facing a similar situation with VDX6740, DHCP relay under interface ve (which interface ve under rbridge).

Regular Visitor
Posts: 1
Registered: ‎05-03-2016

Re: vdx 6740 nos 6.0.1 dhcp relay

I have encountered this and hate to break it to you but it is listed as DEFECT000563574 and is fixed in 7.0.0a

 

the workaround is to disable/enable the effected rbridge ve interfaces

Brocadian
Posts: 1
Registered: ‎02-23-2015

Re: vdx 6740 nos 6.0.1 dhcp relay

[ Edited ]

Hello,

 

This is related to DEFECT000579668, which is fixed in 5.0.2c, 6.0.2b and 7.0.0, and only affects Fabric Virtual Gateway.

 

This is NOT related to DEFECT000563574, which is an issue where power is lost to the VDX, and then the DHCP discover is not forwarded after recovery.

 

Please read the release notes if you have any more questions.

 

Thanks!

Frequent Contributor
Posts: 95
Registered: ‎03-23-2015

Re: vdx 6740 nos 6.0.1 dhcp relay

Thanks @jbloom for posting the resolution!

Dennis Smith
Manager Brocade Communities
@DennisMSmith
New Member
Posts: 1
Registered: ‎03-07-2017

vdx 6740 nos 7.1.0 dhcp relay

Two VDX 6740 in logical chassis mode - NOS 7.1.0GA.

and Fabric Virtual Gateway is in use.

some VE interfaces with fabric virtual gateway on every VDX.

 

Problem:The function of "ip dhcp relay" on this VE interfaces

does not work.

 

I wrote the ip proxy-arp command on ve on the DHCP client side.

Then, the DHCP client immediately talked to the DHCP server.

I have not been able to decide whether this method is correct or not.

But this is a very similar case.
I am happy if this information helps someone.

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