BladeSystem Virtual Connect
Showing results for 
Search instead for 
Did you mean: 

C7000 1/10Gb VC modules. More than one SUS to same switch.

Occasional Advisor

C7000 1/10Gb VC modules. More than one SUS to same switch.

Existing C7000 with following module 1 & 2 1/10GB VC Ethernet 3 & $ 1/10GB VC Ethernet with external stacking links connected from module 1 to 3 and 2 to 4.


2 Procurve 2810-24G with Trk1 on 20-24 between switches Trk2 ports 1&2 Trk3 ports 3&4 on each switch

SUS '2trunk2' lag id 24 from module 1 ports 1&2 to each switch1 Trk2 module 2 ports 1&2 to switch2 Trk2

SUS '2trunk3' lag id 24 from module 3 ports 1&2 to each switch1 Trk3 module 4 ports 1&2 to switch2 Trk3

Vlans tagged down both SUS (vlan 1001-1010 over SUS '2trunk2' and Trk2, vlan 2001-2010 over SUS '2trunk3' and Trk3) and all over Trk1 on the Procurves. All nice and been running for a couple of years no downtime.


I want to add another SUS from module1&2 ports 3&4 to Trk4 on the pair of swicthes so that a separate set of vlans can be guaranteed a 2G pipe rather than add the ports to existing SUS and sharing the bandwidth.


I have added the new trunk and SUS and assigned ports, but they only show as linked/standby, the ports on module1 show lag id 23 and on module2 lag id 25. I assume it's not possible


Finally, have I got a nasty supprise waiting for me when a module fails, as what I think is two separate SUS to Procurve Trk2 and Trk3, is actually one as they have the same lag id and I will loose some vlans on module failure as the vlans don't get tagged down both SUS and over the Procurve trunks.

Hope that makes some sense.



The Brit
Honored Contributor

Re: C7000 1/10Gb VC modules. More than one SUS to same switch.

I could be wrong here, but as I read your post I get the impression that you are mixing ports from different IC modules (i.e. bays 1 & 2) in the same UplinkSet.   Is that correct.


If so, then my understanding is that in this configuration, the ports will always be Active/Standby.    If you want all of your ports on all of your UplinkSets to be Active/Active then you need to restricts your SUS' to ports on the same IC modules and to only one switch for each SUS, so, if you currently have


SUS 1 = Mod 1(ports 1 & 2) + Mod 2(ports 1 & 2) -> Switches 1 & 2

SUS 2 = Mod 1(ports 3 & 4) + Mod 2(ports 3 & 4) -> Switches 1 & 2


change to


SUS1A = Mod 1(ports 1 & 2) -> Switch 1

SUS1B = Mod 2(ports 1 & 2) -> Switch 2


SUS2A = Mod 1(ports 3 & 4) -> Switch 2

SUS2B = Mod 2(ports 3 & 4) -> Switch 1


Set up your vLANs (say vLAN ID 5) as vLAN_5_1A, vLAN_5_2A, vLAN_5_1B,  and vLAN_5_2B, (all with ID 5), and assign them as appropriate.


I think this will give you the same redundancy as your current plan, however it should also give you all ports Active/Active.