Hi all I have created an etherchannel trunk between a 6506 and a Cisco Blade Switch 3020 a couple a month ago For 3 days now, I have one of the trunk down within the channel.
%EC-5-CANNOT_BUNDLE2: Gi0/17 is not compatible with Gi0/18 and will be suspended (speed of Gi0/17 is 100M, Gi0/18 is 1000M)
I don't know how to fix that.
Can you help ?
on the 6504 Gi2/13 C7000-TRUNK-1/4 connected trunk a-full a-1000 10/100/1000BaseT Gi2/14 C7000-TRUNK-2/4 connected trunk a-full a-1000 10/100/1000BaseT Gi2/15 C7000-TRUNK-3/4 connected trunk a-full a-1000 10/100/1000BaseT Gi2/16 C7000-TRUNK-4/4 notconnect 1 auto auto 10/100/1000BaseT
on the CBS3020 Gi0/17 to lux-swdr1 notconnect 1 auto auto Not Present Gi0/18 to lux-swdr1 connected trunk a-full a-1000 10/100/1000BaseTX Gi0/19 to lux-swdr1 connected trunk a-full a-1000 10/100/1000BaseTX Gi0/20 to lux-swdr1 connected trunk a-full a-1000 10/100/1000BaseTX
sounds like its autonegotiating to 100 meg on that link which indicates somewhere in that path you do not have 8 good wires , gig uses all 8 wires where 100 meg uses 4 wires . Try replacing patch cables on both ends .
This looks to be a physical issue between these two devices. If you look at the "show interface status" you supplied the link appears to be down from a layer 1 perspective:
Gi2/16 C7000-TRUNK-4/4 notconnect 1 auto auto 10/100/1000BaseT
Gi0/17 to lux-swdr1 notconnect 1 auto auto Not Present
Also if you look closely at the output from the 3020, it looks like the SFP is not being detected properly, as it is specified as " Not Present" rather then with the supported speed (10/100/1000, etc).
I would check to make sure the SFP is seated properly and has not been pulled out of the 3020. If the SFP is seated correctly, I would replace this SFP.
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