01-30-2012 01:42 PM - edited 03-07-2019 04:38 AM
Ok, so this is weird.
I have a new 6509e that is set for trunking to an older WS-C3560G-24TS-S.
Version for the WS-C6509-E is s72033-advipservicesk9_wan-mz.122-33.SXI7
Version for the WS-C3560G-24TS-S is c3560-ipbase-mz.122-25.SEE3
Both ports are set for trunking, but will only connect at FULL/100.
Have tried to set it for FULL/1000, but the links will not come back up.
Port for the 6509 is G2/1
Port for the 3560 is G0/23.
Are there any known issues with either this combination and/or individual devices?
Also, I know that the use of a PoE switch should not cause issues when connecting to Core Devices, but have always been taught that PoE switches fo to PoE devices.
01-30-2012 01:47 PM
Both ports are set for trunking, but will only connect at FULL/100.
Copper link? At what distance? 1000 metres? That's not possible. Copper ethernet is valid to up to 100 metres. You need fibre optic if you want to go 1 km.
01-30-2012 01:49 PM
Oh, sorry Meant to say it will not connect at 1Gig, only at 100Mps.
Distance is about 200ft.
01-30-2012 02:29 PM
If its switch to switch then put both sides at auto/auto and see what happens . There should be no problem at 200 ft unless you have some bad pairs in that link . Gigabit needs 4 good pairs to run at a gig otherwise it will fallback to 100 /full. Check your cabling for 8 good wires in the complete path between the ports on each switch.
01-30-2012 02:35 PM
AUTO/AUTO will just down the link.
New factory cable and same results.
01-30-2012 02:40 PM
What kind of cable are you using crossover or straight thru ? There should be no issues between these devices they all negotiate and are configured the same as far as the ports go .
01-30-2012 02:42 PM
I am unsure about that.
I will have to check that out and get back tomorrow.
Will that cause an issue? Thought for the longest time now that Cisco Ports are Auto sensing, and while good practice, it is not needed anymore.
01-30-2012 02:44 PM
If its straight thru then you can only use auto/auto as mdix is needed to correct the pairs and mdix will only work if both ends are set as auto/auto . If its a gigabit crossover then you should be able to set it either hardcoded or auto/auto . Make sure the ports are set for mdix auto .
01-30-2012 08:46 PM
Both ports are set for trunking, but will only connect at FULL/100.
100 Full only, eh? Let's try a TDR test on the 3560G (if your 3560 is indeed a "G").
Try this command only one the 3560G.
1. Command: test cable tdr interface G0/23
2. Wait for about 5 to 7 seconds;
3. Command: sh cable tdr interface G0/23
4. Please post the complete output.
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