Quick ip default-gateway question

[phjohnso]

I need to change the default gateway on all the pc's in work to point to a different address.  I know this is done through dhcp settings on the dhcp servers.

The switches also have a   ip default-gateway x.x.x.x statement in them.

In our case the switches poiint to our core switch as the default gateway.

What is the difference between the two gateways - the one on the switches and the one that will be in the pc's???

Thanks in advance.

[Fredrik Lönnman]

Depends, but if the switches are in the same, only, vlan as the PCs then nothing. Often switches are managed in their own vlan for management and the default-gateway points to the rest of the network.

[Michael A. McKenney]

Depends on how your network is configured.   I connect my three A58xx with VLANs to a ASA-5520 firewall.  Each VLAN has its own interface on teh ASA-5520.  

Each VLAN has its own gateway in the routing tables to route VLAN to VLAN.   Policy based routing through ACL lists allow ASA-5520 interfaces in connected to the VLANs to also be gateway.   The ASA-5520 does not allow multiple paths so policy based routing allows VLAN to VLAN routed traffic across the switch.  Any other traffic out the ASA.