L3 port in Switch keep on getting hang

[ciscoavinash]

Hi Team,

I have one ISP link terminated in switch. Switch model is WS-C3560G-24PS.

interface GigabitEthernet0/24
no switchport
ip address 127.1.1.1238 255.255.255.252 Changed the IP.

Default Route to 

ip route 0.0.0.0 0.0.0.0 127.1.1.237.

Network work normally and once in a month it stops working. we are able to gateway with out any issue. So i suspect WAN interface is getting hang.

When i just shut and unshut the WAN interface then traffic start flowing or if i ping gateway from my 3560 switch also it resolves the issue.

interface Vlan1
ip address 129.1.1.2 255.255.255.192

[Philip D'Ath]

What software version are you running?

If you can ping the default gateway and it starts working it is not likely to be a hung interface.

I would be interested in the "show arp" entry for 127.1.1.237 when it is working, and while it is broken.

Also I would be tempted to add the following on GigabitEthernet0/24:

no ip redirects
no ip unreachables
no ip proxy-arp

[Philip D'Ath]

Does anything interesting appear in the switch log when it is broken?