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Management Vlan

I am experiencing the following problem at a client site any suggestion on how to resolve this problem would be greatly appreciated.

The client has got 2 Cat6509 core switches, there is a

cat4507R with a Sup4 hanging off these two core switches. These switches are

connected via dot1q trunks. All inter vlan routing is being done on the two

Cat6509 core switches. On the Cat4507R there is a "interface vlan 1"

with ip address, we have lost connectivety to this address. On the

trunks the native vlan is vlan 1. All other devices in all the other vlans on

this switch including other devices in vlan 1 still have full connectivity.

The uplink ports form the Cat4507 to the Cat6500's is Gig1/1 and Gig 2/1.

We have removed vlan 1 from the trunk on Gig 1/1 to force it to go over Gig2/1

but this had no effect on the connectivity to If you connect via the

console to the Cat4507 and ping the ping is successfull, if you

connect a pc to vlan 1 on the cat4507 and ping it is unsuccessfull.

A "shut" and "no shut" performed on "int vlan 1"

does not solve the problem, we also removed the ip address from vlan 1 and

then put it back again after 10min but this did not work either.

So in short, only connectivity to "int vlan 1" has been lost all

other devices connected to the cat4507 are working even other devices that are

connected to vlan 1 and are connected to the cat4507.


Re: Management Vlan


As u say that u r having two uplinks from gig1/1 and gig2/1 to the core switches so it means that u have redundant connections.can y verify among these two ports which one is blocking and which one is forwarding.i think it is related to some STP issue.




Re: Management Vlan

does the 4507 switch show vlan1 as active?

could be prunned across the trunk. verify what the trunk is supporting in terms of what vlans.

send config and show spanning-tree for more input. (keep sensitive ip addys out)


Re: Management Vlan

Is the SVI still up/up? If so, are you trying to get to the interface from within the same subnet? If not, have you checked the default route for this subnet, making sure that proper routing is taking place?