09-05-2006 11:01 AM - edited 03-03-2019 01:52 PM
My internal switches are connected to a Firewall which is connected to an outside 3750G switch.
The outside 3750G switch is connected to a Cisco 3825 Router which has a T3 card for Internet access.
Right now the switch is connected to the router but the type of port is unspecified.
Do I need to make this a trunk port or an access port? Anything else I need to do to this port ?
Solved! Go to Solution.
09-05-2006 03:56 PM
These commands are applicable only to the switch. There isn't anything you need to do on the router end. You might want to set the speed/duplex to match on both ends, if auto setting is giving you problems.
HTH
Sundar
09-05-2006 11:05 AM
It's recommended to force the mode to access or trunk in order to avoid the autosensing feature.
I also recommend enabling portfast on the port as well as making sure the speed/duplex match at each end.
09-05-2006 11:11 AM
Hi,
By default, all switchports belong to vlan 1. It should work as it is. But, if you want then you could change it to another vlan. The only criteria is that the port to the outside interface of the firewall and the interface to 3825 has to be on the same vlan as these two interfaces will belong to the same IP subnet. Configure the port as an access port that way the default mode (dynamic desirable) doesn't try to form a trunk association.
int f0/1
description interface to firewall
switchport mode access
switchport access vlan 2 --> Optional setting
spanning-tree portfast
int f0/2
description interface to outside 3825 router
switchport mode access
switchport access vlan 2 --> Optional setting
spanning-tree portfast
Hope this helps!
Sundar
09-05-2006 03:36 PM
Thanks for the info, if I set the switch port that connects to the router as
switchport mode access
spanning-tree portfast
Do I do the same of the router port ?
Note: The ports on the switch are all in vlan 1 on the same subnet as the router port.
09-05-2006 03:56 PM
These commands are applicable only to the switch. There isn't anything you need to do on the router end. You might want to set the speed/duplex to match on both ends, if auto setting is giving you problems.
HTH
Sundar
09-05-2006 04:02 PM
Both ports are gigabit so Auto is the only way to go.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: