Cisco 3925 port-channel to Nexus 5596

[Oleg Volkov]

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?

Thanks!

[Reza Sharifi]

Hi,

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?

HTH

[Oleg Volkov]

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 10.0.0.1/30

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
                   11-513

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
49     Po49        up     success     success                    1,52-59,64,
                                                                 69,75,147-1
                                                                 48,150-155,
                                                                 158-164,254
                                                                 -255,511....
50     Po50        up     success     success                    1,52-59,64,
                                                                 69,75,147-1
                                                                 48,150-155,
                                                                 158-164,254
                                                                 -255,511....
51     Po51        up     success     success                    1,52-59,64,
                                                                 69,75,147-1

.....
.....

                                                                 48,150-155,
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                   : 10.0.0.2
--Keepalive interval            : 1000 msec
--Keepalive timeout             : 5 seconds
--Keepalive hold timeout        : 3 seconds
--Keepalive vrf                 : VPC_LNK
--Keepalive udp port            : 3200
--Keepalive tos                 : 192

[Reza Sharifi]

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.

HTH