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ASA 5512 drops connections after every 4 hours...!!

CSCO12318778
Level 1
Level 1

Hello Everyone,

I have been trying to figure it out but unable to know what's the problem.  My ASA is connected to comcast modem directly and everything was working normally when I first installed it but after 4 hours (approx) I can't reach the internet. but my interfaces are UP. I have interface reset and CRC errors on my external interface..!!  collisions and late collision on my internal interface...

One more thing i would like to mention here... I was able to ping 8.8.8.8 from commcast modem but couldn't do that from Local LAN and ASA as well

my network is pretty straight forward...!         Comcast modem <---------->ASA<--------------->Local LAN

I had to reboot my comcast modem in order to get the ASA work properly

can some one please help me...!!

thanks

--

Raj

13 Replies 13

Julio Carvajal
VIP Alumni
VIP Alumni

Hello,

When the issue happens,

Are you able to ping the comcast modem from the ASA itself?

Do you see the MAC address of the next-hop device on the arp table of  both the modem and ASA?

Sounds like an ARP issue,

Regards

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC