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New log? "Packet is neither ipv4 nor ipv6"

On a 892FSP router running Version 15.7(3)M1 I get a new type of messages in my log. The router is connected to the internet, with at inbound ACL on the interface, and it runs DMVPN.

 

I do get all the normal scanning attempts from the internet but also this new entry "Packet is neither ipv4 nor ipv6"

 

What is this all about? I have google´d it but did not find anything from cisco.

 

 

Jan 28 07:52:17.786: %SEC-6-IPACCESSLOGP: list outside_in denied udp 167.114.46.166(5062) -> xxx.xxx.xxx.xxx(5060), 1 packet
Jan 28 07:52:21.014: %SEC-6-IPACCESSLOGP: list outside_in denied tcp 101.99.6.176(27059) -> xxx.xxx.xxx.xxx(445), 1 packet
Jan 28 07:52:44.138: %SEC-6-IPACCESSLOGDP: list outside_in denied icmp 206.117.25.90 -> xxx.xxx.xxx.xxx (8/0), 1 packet
Jan 28 07:52:54.086: Packet is neither ipv4 nor ipv6

2 Accepted Solutions

Accepted Solutions

Hello,

 

I have tried to access the IP addresses in your log.

 

This one is especially interesting:

 

206.117.25.90

https://ant.isi.edu/datasets/about.html

View solution in original post

This is now documented under bug ID - CSCvi42835.

View solution in original post

10 Replies 10

Hello,

 

I have tried to access the IP addresses in your log.

 

This one is especially interesting:

 

206.117.25.90

https://ant.isi.edu/datasets/about.html

We too are seeing this with version 157-3.M1.bin but how can we filter these from eating up our syslog and spewing to the terminal? We are seeing them every 10 seconds.

Brian Schultz
Level 4
Level 4

Did you figure out what was causing this?  I'm seeing this same message after upgrading some 2921's to 15.5(3)M7.

 

-Brian

It's most likely a software issue. I was able to keep it from filling the logs by installing a logging discriminator that matches a regular expression filter like so:

 

logging discriminator PACKET mnemonics drops _Packet is neither ipv4 nor ipv6
logging buffered discriminator PACKET 4096

Bob Goal
Level 1
Level 1

I have also got this issue on C897VA-K9 with 15.5(3)M7. The issue was not present on 15.5(3)M6a

 

Mar  6 11:13:13: Packet is neither ipv4 nor ipv6

Could somebody open a TAC case for this? I haven't seen any bug id related to the issue. This particular device is not curently covered with the service contract.

In my case, I was able to eliminate this log from appearing after disabling CDP on my DMVPN tunnel interface.  

Disabling CDP on DMVPN interface resolved the issue!

This is now documented under bug ID - CSCvi42835.

In my case, I see such messages even if the CDP is disabled globally. I also do not have a DMVPN.

Cisco 3925e - 15.5(3)M7.

Thanks.

Not really the best "solution". Really hope Cisco will fix it but I still see this, even in the newest 15.7 :-(
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