Ether channel

Unanswered Question
Mar 19th, 2008

I have a 3750 connected to 2821.3750 has two ports configured as ether channel as trunk.On 2821 i want to configure 2 fast Ethernets in L3 ether channel. When i give command "ether-channel 1 mode on", it only takes "ether-channel 1" as a result when i do "show int fasteth 0/0 ether-channel" it says that ether-channel is disabled.

On which IOS is it supported ?

I want to use trunk ether channel on switch side and L3 ether channel on router side with sub interfaces on the port channel, as my switch will have different VLANS, with the port-channel sub interfaces in the respective vlans?

any help in configuration ?

I have this problem too.
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Joseph W. Doherty Wed, 03/19/2008 - 16:18

I may be mistaken, but I recall the 28xx built in Ethernet ports are only routed ports. To channel ports, you may need to use one of the Ethernet port add-ons modules. (You might consider connecting to 3750 at gig speed [via copper sfp if you don't otherwise have copper gig ports].)


Ah, more not-current rather than mistaken. Thank you Padmanabhan.


What's interesting is this was introduced for the 2821 embedded interfaces in 12.4(17.6)! A feature enhancement in mainline code?


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