Possible Routing Loop?
Hi Everyone,
I just recently made some configuration changes at a remote site.
The site has 1 router, 1 6509 (switch A) and 1 6509 (switch
.
Switch B acts as a Layer 2 switch and connects to Switch A via Gi1/1 (trunked port).
Switch A (does the local static routing) connects to the Router which routes to the Internet or Corporate via the Cloud.
Switch A config:
*ip route 0.0.0.0 0.0.0.0 10.13.5.1 (points to the Router)
*Interface VLAN 1
ip address 10.13.159.129 255.255.255.192 secondary
ip address 10.13.98.129 255.255.255.192
Switch B config:
ip default-gateway 10.13.159.129
ip route 0.0.0.0 0.0.0.0 10.13.159.129
As I was consoled into Switch A, I Telneted to Switch B and removed "ip route 0.0.0.0 0.0.0.0 10.13.159.129". I did this because it only needs to act as a layer 2 switch. Once I removed it I was kicked out of my console session on Switch A. I could not reconnect to Switch A via console for a few minutes.
I think when I remove the ip route from Switch B it somehow created a routing loop. Any thoughts?
I just recently made some configuration changes at a remote site.
The site has 1 router, 1 6509 (switch A) and 1 6509 (switch

Switch B acts as a Layer 2 switch and connects to Switch A via Gi1/1 (trunked port).
Switch A (does the local static routing) connects to the Router which routes to the Internet or Corporate via the Cloud.
Switch A config:
*ip route 0.0.0.0 0.0.0.0 10.13.5.1 (points to the Router)
*Interface VLAN 1
ip address 10.13.159.129 255.255.255.192 secondary
ip address 10.13.98.129 255.255.255.192
Switch B config:
ip default-gateway 10.13.159.129
ip route 0.0.0.0 0.0.0.0 10.13.159.129
As I was consoled into Switch A, I Telneted to Switch B and removed "ip route 0.0.0.0 0.0.0.0 10.13.159.129". I did this because it only needs to act as a layer 2 switch. Once I removed it I was kicked out of my console session on Switch A. I could not reconnect to Switch A via console for a few minutes.
I think when I remove the ip route from Switch B it somehow created a routing loop. Any thoughts?
Comments
I was kicked out of my console session on Switch A but it's possible it did just hang.
If so it seemed like such a long time that I assumed that I was kicked out.
I just remember trying to reconnect via the console with no luck.
If I remember correctly, I think it took a few minutes again for me to console back into Switch A. Once consoled in, I could not Telnet to Switch B.
I then walked over to Switch B, consoled in and then put the "ip route" back in just so I could get things back to normal.
Please advise me on what section I need to post this type of question. I am somewhat new to this site as far as posting goes.