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New Member

Cisco 3925 port-channel to Nexus 5596

Dear Sirs!

I have two Nexus 5596 (single side vPC) and one Cisco ISR G2 3925.

I want to make between this equipment, Port-channel, and connect Cisco 3925 to each Nexus. Because Cisco 3900 do not support LACP, can I make static port-channel? (channel-group 1 mode on).

In the future, I will connect two ASA5515, each ASA to both Nexus. Can I use static port-channel with vPC?


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VIP Super Bronze

Hi, If the 5ks are sigle



If the 5ks are sigle sided vPC, that means they are not connected together.  If that is the case you can't connect the 3925 to both 5ks.

Can you clarify?


New Member

Maybe I incorrectly described

Maybe I incorrectly described my network.
I have two nexus 5596 and vPC peer link between them:

interface port-channel1
  description VPC KEEPALIVE LINK
  no switchport
  speed 10000
  vrf member VPC_LNK
  ip address

interface port-channel2
  description VPC PEER LINK
  switchport mode trunk
  spanning-tree port type network
  speed 10000
  vpc peer-link

vPC Peer-link status
id   Port   Status Active vlans
--   ----   ------ --------------------------------------------------
1    Po2    up     1,52-59,64,69,75,147-148,150-155,158-164,254-255,5

vPC status
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
49     Po49        up     success     success                    1,52-59,64,
50     Po50        up     success     success                    1,52-59,64,
51     Po51        up     success     success                    1,52-59,64,


ZES-CSW02# sh vpc peer-keepalive

vPC keep-alive status             : peer is alive
--Peer is alive for             : (144921747) seconds, (787) msec
--Send status                   : Success
--Last send at                  : 2014.03.16 22:26:52 133 ms
--Sent on interface             : Po1
--Receive status                : Success
--Last receive at               : 2014.03.16 22:26:52 203 ms
--Received on interface         : Po1
--Last update from peer         : (0) seconds, (639) msec

vPC Keep-alive parameters
--Destination                   :
--Keepalive interval            : 1000 msec
--Keepalive timeout             : 5 seconds
--Keepalive hold timeout        : 3 seconds
--Keepalive vrf                 : VPC_LNK
--Keepalive udp port            : 3200
--Keepalive tos                 : 192


------------------------------------------------------ Helping seriously ill children, all together. All information about this, is posted on my blog
VIP Super Bronze

Yes, in this case since the

Yes, in this case since the 5ks are connected together using a vPC peer link, the portchannel will work fine. Just configure the ports as on.