Multilayer switching and routing issues

[NettableWalker]

Hi Everyone,

I've got a badly behaving LAN. Please help as i think i've got things confused.

I've got about 10 2960 access switches connected with about 3 3560's as distribution switches. My 3560-G is the only one set to use IP routing (with OSPF- this works ok on all the other routers etc and shows a full routing table so is not the problem). I have SVI's for all the vlans on this switch and the VLAN specific IP address is the default gateway as set via DHCP for all the clients.

Do i need/want the other 3560's set with IP routing as well? is this necessary? will it confuse things? do i need to put SVI's on the other 3650's? if so what IP address? is this now the default gateway?

I have several devices that i cannot ping from my workstation, but they can be pinged from elsewhere in the LAN, (some from the same Vlan), and i think ARP might not be resolving properly as one of the 3650 switches shows very few MAC addresses.

Any ideas of what to do to check this?

MCP,CCA,CCNA,CCNP,Net+.

 

[leedsit]

Hi,

If you having L2 ( lan ) issues, I.E Local network devices on different switches in the same Vlan cannot talk to each other, Id start there, rather than looking at Layer 3. Do a thorough check to make sure all of the Trunks / VLANS and switchports are configured correctly. Dont let anything auto learn such as etherchannel etc. Once you have your L2 stuff working the rest should be ok.

Lee.


LEEroy
MCNE6,CCNP,CWNA,CCSA,Project+