ASA5510 new ISP port "down/down" - Help required

Cormac Champion — Thu, 24 Sep 2020 18:51:27 GMT

Hi all,

I'm not fully familiar with ASA's but I'm really stumped and need help. I have a HA pair of 5510's with a current ISP connection in them. We now have a new ISP connection which I have connected to Eth0/3. The link has been provisioned as a /30. Last week, I connected it up, set the interface with it's IP and I could ping the opposite end ISP GW. All good.

So I went to migrate today and wanted to move the new connection across into Eth0/0 and leave that interface called "outside", and apply the IP on it. Anyway, it would not work. I failed back and began to try and investigate what the issue is.

So now, having reverted back, no matter what I do (shut / no shut) (disconnect link to secondary of HA), the interface Eth0/3 is now down/down, despite the link light being on, and the connection from an intermediate switch showing as up/up - but sending traffic and receiving nothing back from the ASA.

So it looks like the ASA port is stuck in some state. A reboot left it in the same state - I just cannot get it to come up again.

I took the cable out of the ASA and connected it into my laptop, assigned my laptop the IP address that the ASA is being given - perfect - I can reach the ISP and beyond. So I put it straight back into the ASA and ........ still down / down. If I remove the speed and duplex, still no joy.

Any help or suggestions would be greatly appreciated

Thanks in advance

Re: ASA5510 new ISP port "down/down" - Help required

Cormac Champion — Fri, 25 Sep 2020 21:53:10 GMT

Ok, all resolved

Re: ASA5510 new ISP port "down/down" - Help required

bernardlaymon — Thu, 22 Jul 2021 20:04:57 GMT

What was the resolution? I am having the same issue with my secondary ASA. All of a sudden my interfaces went down.

Tried a couple of reboots.

topic Re: ASA5510 new ISP port "down/down" - Help required in Network Security

ASA5510 new ISP port "down/down" - Help required

Re: ASA5510 new ISP port "down/down" - Help required

Re: ASA5510 new ISP port "down/down" - Help required