Tunnel not working after IOS upgrade

[cvanmeer]

Hi all,

Today I upgraded my Cisco 1841 from IOS 12.4(25g) to IOS 15.1(4)M5.
Since that upgrade, my IPv6 tunnel is not working properly anymore.

I can ping the IPv4 tunnel destination, but I can't ping the IPv6 broker's end.
Internally the IPv6 all works, I can see IPv6 neighbours, so I guess it's not some sort of license thing that disabled IPv6.

I tried removing the ipv6 traffic-filter, but still no ping reply.
When I do a ping to google.com, it can resolve the IPv6 address, but no ping reply:

Code Select Expand

CoreRouter#ping google.com
Translating "google.com"...domain server (212.54.35.25) [OK]

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2A00:1450:400C:C05::8B, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

Does someone know what to do?

Thanks in advance,

Chris

[KiLaHuRtZ]

This may help...

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/15-1mt/ipv6-15-1mt-book.pdf

Although, I would recommend staying on the 12.4 train for the x800 series.  If you want the feature adds that 15.0 has, use the 12.4T train, versus the mainline, as the "T" signifies it has the features of the successor IOS...

http://en.wikipedia.org/wiki/Cisco_IOS#Trains

I would recommend 15.x train more for the x900 series.

I myself use 12.4(24)T8 on my 1812's...no stability problems.  Hope this helps!  :)

[nickbeee]

Although, I would recommend staying on the 12.4 train for the x800 series.  If you want the feature adds that 15.0 has, use the 12.4T train, versus the mainline, as the "T" signifies it has the features of the successor IOS...

Definitely for the older 800's (85x, 87x). If you want 15.0 then you'll be upgrading RAM and FLASH.

I would recommend 15.x train more for the x900 series.

And also the later 800's such as the 860 and 880. I've got the 867VAE on my home net with two tunnels that has 15.1(4)M4.

I myself use 12.4(24)T8 on my 1812's...no stability problems.

There was an issue with ip inspect throughput on the earlier 12.4T releases. I've got 12.4(24)T6 running happily on 871 and 877 with HE and other ISP tunnels.