Solved: connecting 2950 to 3508G-XL

alyasrazzaq · ‎11-19-2007

Hi, I have connected the GBIC port on a 3508G-XL to a 2950 FastEthernhet port, however, the ports are not coming up. I have tried straight through and crossover cables. Please could someone advise wheter the 2 switches can be connected and using which cables.

Your advice is much appreciated.

Thanks

andrew.butterworth · ‎11-19-2007

You can't connect a 1000BaseT GBIC to a FastEthernet interface. The 1000BaseT GBIC's (WS-G5483) only operate at 1Gbps. You will need a 1000BaseT interface on your 2950 to connect it to, there are no other options with the 3508G-XL. I assume you have a 2950 that only has 10/100 FastEthernet interfaces?

HTH

Andy

View solution in original post

andrew.butterworth · ‎11-19-2007

You can't connect a 1000BaseT GBIC to a FastEthernet interface. The 1000BaseT GBIC's (WS-G5483) only operate at 1Gbps. You will need a 1000BaseT interface on your 2950 to connect it to, there are no other options with the 3508G-XL. I assume you have a 2950 that only has 10/100 FastEthernet interfaces?

HTH

Andy

alyasrazzaq · ‎11-19-2007

Thanks for the comment. Yes, the 2950 only has 10/100 interfaces. Thanks for clearing that one up.

muca · ‎03-05-2008

Hi,

Do you know if there is any kind of imcompability with 3750 and 3560.

Scenario (test environment):

A 3750 (routing) and a 3560(access ports on vlan 95 and 96)

Trunk - 3750 using a fastethernet port and 3560 gig SFP.

If I connect a host on vlan 95, I can ping all interface vlans on the 3750 (management, vlan 95 and 96).

If I connect same host on vlan 96, can't not even ping the default gateway.

Also can ping all interfaces on 3750 from the 3560.

If I connect trunks at 1000 (SFP) both hosts can ping interfaces on 3750.

Trunks have exactly the same config (using fa or gig) and access ports too.

Any clues?

glen.grant · ‎03-05-2008

Sounds like the trunk is not even up and is up as access link only , verify with a show interface trunk . Both sides should look the same with this command . If still a problem post the interface commands from both sides

muca · ‎03-05-2008

Trunk seems to be ok. The funny thing is that I can ping interfaces on the 3750 from the 3560, which means the trunk is working.

See attach.