01-24-2014 06:09 PM - edited 03-07-2019 05:47 PM
Can i use spantree portfast on etherchannel links?
01-24-2014 06:31 PM
i am trying to configure etherchannel between dell esxi host and a 6509
interface Port-channel1
switchport
switchport access vlan 120
switchport mode access
no ip address
shutdown
interface GigabitEthernet5/5
switchport
switchport access vlan 120
switchport mode access
no ip address
spanning-tree portfast
channel-group 1 mode on
interface GigabitEthernet5/4
switchport
switchport access vlan 120
switchport mode access
no ip address
spanning-tree portfast
channel-group 1 mode on
is this ok configuration?
channel-group 1 mode has several options
active Enable LACP unconditionally
auto Enable PAgP only if a PAgP device is detected
desirable Enable PAgP unconditionally
on Enable Etherchannel only
passive Enable LACP only if a LACP device is detected
what option should i use?
01-24-2014 06:35 PM
Personally, I wouldn't do it. If for some reason your etherchannel breaks and spanning tree sees each link as individual links instead of the port-channel as a whole, you're asking for trouble.
As far as your modes, I'd select active or desirable on both ends. "On" mode doesn't use a negotiation protocol, but Active (LACP) or Desirable (Pagp) uses negotiation for the other end. The Active and Desirable modes actively try to form an etherchannel, whereas the Passive and Auto modes listen for the negotiation but don't try to actively form an etherchannel.
HTH,
John
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01-25-2014 06:46 PM
hi
I configured the port channel but show etherchannel 1 summary is showing this
SE6509#show etherchannel 1 summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SD) LACP Gi5/4(I) Gi5/5(I)
why is the Portchannel in a SD state? It means its down?
01-25-2014 07:04 PM
Yes, it's down. Are the ports physically up? Have you configured the other side?
I also noticed that the port channel interface is shut...
HTH,
John
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01-25-2014 07:38 PM
The device on the far end has to be setup as an LACP negotiated etherchannel also for it work . Talk to the people who support the dell.
01-25-2014 09:38 PM
the other end is a esxi host. from he documentation, I have setup the nics to route based on IP hash but still the port channel is in a down state
01-26-2014 12:21 PM
Tony
It's not to do with the load balancing method ie. IP hash it is far more fundamental than that. The ESXi host is not forming an etherchannel with the switch.
You need to check the host end.
Jon
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