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New Member

Renumbering FEX

Does anyone know of a method to renumber a FEX without causing service disruption?

Currently I have the following FEX configuration:-

5548# sh fex

  FEX         FEX           FEX                       FEX

Number    Description      State            Model          

------------------------------------------------------------------------

101  fex01                     Online     N2K-C2248TP-1GE  

103  fex03                     Online     N2K-C2248TP-1GE  

105  fex05                     Online     N2K-C2248TP-1GE  

107  fex07                     Online     N2K-C2248TP-1GE  

109  fex09                     Online     N2K-C2248TP-1GE  

111  fex11                     Online     N2K-C2248TP-1GE  

and ideally I want this to change to a sequential numbering scheme:-

5548# sh fex

  FEX         FEX           FEX                       FEX

Number    Description      State            Model          

------------------------------------------------------------------------

101  fex01                     Online     N2K-C2248TP-1GE  

102  fex02                     Online     N2K-C2248TP-1GE  

103  fex03                     Online     N2K-C2248TP-1GE  

104  fex04                     Online     N2K-C2248TP-1GE  

105  fex05                     Online     N2K-C2248TP-1GE  

116  fex06                     Online     N2K-C2248TP-1GE 

Easy enough to:-

1) Preprovisioning the new FEX number

2) Mirror the config

3) Change the FEX association on the FEX downlink ports on the 5548

but I'm certain this will cause a disruption to the connected hosts ports which are in production on the FEX?

Thanks.

Everyone's tags (3)
2 REPLIES
VIP Super Bronze

Renumbering FEX

I think, you are correct.  As soon as you issue no fex 102 for example, it will break the portchannel and that will cause an outage.

I am not sure if this is possible, but how about this:

If you have 2 ports from each 2248 connected to the 5ks presently, take the other 2 ports and build for example portchannel 102 and than delete po 103.  build po 103 delete po 105 build po 104 delete 107 and so on.

Then again, it may be easier to have a short outage window and re-number them.

HTH

New Member

Renumbering FEX

In the end, we had to take the hit on downtime to the FEX to renumber, however preprovisioning the new FEX config minimised the outage.

Thanks for your help and consideration.

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