04-03-2013 08:10 AM - edited 03-07-2019 12:36 PM
we are having trouble with the VPC, and etherchannel ? looked at many forums not to clear on wich one to use, this is are config, we have been getting alot of loops and kills are entire network, please help
nexus switch config,
this is on both nexus we have 2 of them at this site, that talk back to 2 other ones back to another site
pd554801
interface port-channel9
description *PD3750_Fiber01 network rack*
switchport mode trunk
speed 1000
duplex full
vpc 9
interface Ethernet1/4
description *PD3750_Fiber01 network rack*
switchport mode trunk
speed 1000
duplex full
channel-group 9
pd554802
interface port-channel9
description *PD3750_Fiber01 network rack*
switchport mode trunk
speed 1000
duplex full
vpc 9
interface Ethernet1/4
description *PD3750_Fiber01 network rack*
switchport mode trunk
speed 1000
duplex full
channel-group 9
***************************************************************************
3750 switch config
interface Port-channel9
description *port channel to pd3750_Fiber_01*
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
interface GigabitEthernet1/0/1
description *PD554801/p4 TRK*
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 9 mode on
!
interface GigabitEthernet1/0/2
description *PD554802/P4 trunk port*
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 9 mode on
04-03-2013 12:42 PM
should we be putting spanning-tree-portfast on these intfaces?
04-03-2013 12:45 PM
With possibly a few rare exceptions, and only those if you really know your way around spanning tree and how it will behave. You should never put portfast on any port not directly connected to a host (workstation/server).
04-03-2013 12:48 PM
makes since, thanks alot for your input, and help. i got way more help here than any other consultans thanks again
04-10-2013 07:03 AM
after the new configs, everything is working, but i noticed that im seeing alot of counter errors from the 3750 side?
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Fa1/0/23 0 0 0 0 0 273097
Fa1/0/24 0 0 0 0 0 276508
Gi1/0/1 0 4680 0 4680 0 0
Gi1/0/2 0 0 0 0 0 0
Po9 0 4680 0 4680 0 0
is this normal?
this is my config i have in the 3750 side
interface Port-channel9
description *port channel to pd3750_Fiber_01*
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
interface FastEthernet1/0/23
description *2ndFlr trunk port*
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
!
interface FastEthernet1/0/24
description *2ndFlr Trunk Port*
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
!
interface GigabitEthernet1/0/1
description *PD554801/p4 TRK*
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 9 mode active
!
interface GigabitEthernet1/0/2
description *PD554802/P4 trunk port*
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 9 mode active
05-07-2013 12:41 PM
any idea on the error counts, we are getting alot of discards erroros rates from switches that have ether-channel set up to the nexus switches, is this normal.
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