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olivierf_346020's avatar
olivierf_346020
Icon for Nimbostratus rankNimbostratus
Jan 09, 2018

cabling between Viprion and Nexus

Hi all,

 

We've VIPRION C2400 with 2 blades installed and a couple of Nexus N5K switches. How do i connect the blades to cisco ?

 

We have actually installed cables between

 

Blade 1/1.1 <=> Nexus5k-1 eth1/8

 

Blade 1/1.2 <=> Nexus5k-2 eth1/8

 

Blade 2/1.1 <=> Nexus5k-1 eth1/9

 

Blade 2/1.2 <=> Nexus5k-2 eth1/9

 

would F5 trunk with ports 1/1.1 and 2/1.2 (spanned on the 2 blades)

 

with cisco vpc with ports Nexus5k-1 eth1/8 and Nexus5k-2 eth1/9 be working ?

 

what is the best design in our case in order to maximize reliability ?

 

1 F5 trunk with all 4 ports and 1 VPC ?

 

how would you proceed ? thank you

 

application delivery
BIG-IP
devops

3 Replies

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  • Farshad_249798's avatar
    Farshad_249798
    Icon for Cirrus rankCirrus
    Jan 10, 2018

    Yes you can create a link-aggregated trunk across multiple blades . I would create single trunk with all 4 ports and a VPC on nexus unless you need physical port segregation for your environments say you got two vCMPs and from network point of view you need them to be physically segregated.

     

    Generally I'd consider :

     

    • Same number of ports from each blade
    • make total numbers even due to the frame-balancing algorithms
    • What blade are you using? if its 2250 and if you don't have SFP limitation I'd go for ports 1/1.1 , 1/1.5, 2/1.1 and 2/1.5. This gives you physical port resiliency on each blade
    • Andy_McGrath's avatar
      Andy_McGrath
      Icon for Cumulonimbus rankCumulonimbus
      Jan 10, 2018

      Farshad put it perfectly, I would do as he has said if possible regarding 4 port Trunk and 4 port VPC on the nexus.

       

      If you do need physical port separation be careful with Spanning-Tree as the default mode on F5 is 'pass-through' so if any VLANs are shared you could end up with ports being put into blocking from the switch side.

       

  • olivierf_346020's avatar
    olivierf_346020
    Icon for Nimbostratus rankNimbostratus
    Jan 11, 2018

    F5 trunk with 4 ports on 2 blades is now connected to 1 vpc on Nexus & UP !

     

    thank you all

     

    fyi the blades are VIPRION B2250 blade (A112)