Updating or Removing Dynamic or Static Routing Information from Access Switches

[michaelkdj]

Is there away to remove dynamic/static routing information from a access switch without reloading the device?  We had a power outage that cause an entire site to go down/up and after that 2 of switches had incorrect routes when executing "sh ip route" while another switch on the same network had the correct "ip route" information.  Commands I tried to remove the route information with no resolution.

clear arp-cache

clear ip cache

clear ip route *

clear mac address table dynamic "hex add"

Just curious if there is away to clear the data without a reload of the switch

Regards,

Michael

[vijay.swaminathan]

Just Curious..

when you mean 2 of switches had incorrect "ip route" at the time of reboot, did it have the proper startup config?

didn't  removing the configuration related to dynamic / static routing help?

-Vijay

[michaelkdj]

Vijay,

I check both the 2 no working running configs against the running configs of the switches that were working. All of them appeared to be exactly the same.  However when I executed the "sh ip route" the 2 offending switches had an additional route.  Both of these switches are only running layer 2 with "No Ip Routing" services.

[vijay.swaminathan]

can you pls share the output of "sh ip route" on the problematic switch?

-Vijay

[michaelkdj]

Vijay,

Here is the "ip route" information from both working and non-working information.

Non-Working Switch

Host               Gateway           Last Use    Total Uses  Interface

190.110.15.32        190.180.99.3            0:00            24  Vlan99

190.110.99.1         190.180.99.2            0:13           364  Vlan99

190.110.15.99        190.180.99.2            0:02          1119  Vlan99

Working Switch

Host               Gateway           Last Use    Total Uses  Interface

190.110.15.32        190.180.99.3            0:00            24  Vlan99

190.110.99.1         190.180.99.3            0:13           364  Vlan99

190.110.15.99        190.180.99.3            0:02          1119  Vlan99

[glen.grant]

  If they are true layer 2 then there should be no static or dynamic routes to begin with .  It should only have an ip address to manage it and a default gateway .

[michaelkdj]

Glen,

I agree with that statement.  Which makes this even more puzzling. Layer 3 is being handled on our core switch & router which is where I beleive this routes come into play.

But why would reloading the device change the "ip route" information ?   As soon as the offending devices reloaded the gateway address of 99.2 disappeared??