09-10-2013 08:01 AM - edited 03-07-2019 03:23 PM
We have a flexstack 2960s configured for a Netapp 2240 connectivity. We've created a virtual interface on the NetApp side which combines the 4 ethernet ports into 1 virtuall interface. On the switch side we've created an etherchannel and combined the 4 physical ports. The problem we are running into is 1 of the Cisco ports in the the etherchannel comes up as "suspended" The issue seem to be on the Cisco side but I can't seem to find where the issue can be. Below are the configs for the etherchannl and 1 of the ports in the etherchannel. When i remove the suspended interface from the NetApp config the failover process functions without issue. Is there a limit on how many ports can be bundled in a 2960 etherchannel?
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------
1 Po1(SU) LACP Gi1/0/1(P) Gi1/0/3(P) Gi2/0/1(P)
Gi2/0/26(s)
interface Port-channel1
description SAN CONTROLLER A
switchport access vlan 304
switchport mode access
switchport nonegotiate
flowcontrol receive desired
spanning-tree portfast
spanning-tree guard loop
end
interface GigabitEthernet1/0/1
description NSS791A-e0a
switchport access vlan 304
switchport mode access
switchport nonegotiate
flowcontrol receive desired
spanning-tree portfast
spanning-tree guard loop
channel-protocol lacp
channel-group 1 mode active
end
09-11-2013 01:43 AM
Hi Albert,
I only use 3750s to etherchannel with Netapps without any problems, with the following condition for load balance:
port-channel load-balance src-dst-mac
I do not know the limitations of 2960S, but I have etherchannels with 4 interfaces in 2960 (not with netapp):
show etherchannel summary
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) PAgP Fa0/18(P) Fa0/20(P) Fa0/22(P)
Fa0/24(P)
2 Po2(SU) PAgP Fa0/13(P) Fa0/15(P) Fa0/17(P)
Fa0/19(P)
Regards,
Pedro Lereno
09-11-2013 08:36 AM
You are only allowed a maximum of 6 etherchannel groups on a 2960S and 24 on a 2960X but considering your issue I doubt this is what you are hitting. It is more likely that the port with the issue is some how configured differently from the other three ports that are able to be apart of the bundle.
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