I'm relatively new to Cisco networking and very eager to learn everything I can.
Currently the company I work for is undergoing a remodel and expansion. The office building I am in has opened a suite on another floor so employees who are displaced can work there. On my main floor I have a huge Catalyst 4507R with a WS-X4506-GB-T blade in it. I would like to temporarily connect a Catalyst 3750G to it so the people on the other floor have network connectivity. From what I have learning a trunked line can be set up on two ports so the traffic from the 3750G can work with the 4507R. I have a basic setup on the 3750G but when I connect it to the 4507R I get this...
Dec 18 00:14:16.181: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Dec 18 00:14:18.622: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
Dec 18 00:14:48.008: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Dec 18 00:14:50.742: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
Dec 18 00:15:20.220: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Dec 18 00:15:22.820: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
Is this going to be with the 3750g or the 4507R? Do I need a crossover cable in between the swicthes? I get mixed answers some say yes some say no.
I do have a CAT6 RJ45 cable ran between the floors. It is not a crossover setup but a regular typeA Ethernet cable. I currently have a small 5port unmanaged Natgear giga-switch up there and it is working fine. But I will need more ports. Probably 10-15 total but not all at the same time running.
I thought I screwed something up on the 3750G so I did a Write Erase and reload in it. I'm reprogramming it now now with a basic setup, VLAN1 all ports in VLAN1 and port 1 will be my link to the other. I'm getting access to the 4507R here shortly (red tape - egos in play) and will post that port's config ASAP.
I know I'm going to to need to get one port on the 4507 set up for truncating. I was told it would be automatic on the larger switch but it seems not the case.
It won't be automatic if the port has not been configured as a trunk.
You only need a trunk if you have multiple vlans on the 4500 and you need those on the 3750. It depends on the existing config so it's difficult to help without seeing it, but you do need to be careful with VTP. It is unlikely, but there is a chance that when you connect the 2 together theh 3750 could overwrite the vlans on the 4500 which would not be good.
So can you post outputs requested plus a "sh vlan brief" from the 4500 ?
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