topic Unable to ping between IPV6 addresses within the same LAN in Routing and SD-WAN

Unable to ping between IPV6 addresses within the same LAN

anilrs3 — Tue, 05 Mar 2019 05:23:57 GMT

Hi,

I have a "ISR 2911" with "EHWIC-4ESG" used as ethernet switch module.. The four ports in this card are assigned to the same VLAN connecting to routers as these are in the same LAN subnet for IPV4 and IPV6 addressing.

I am able to ping from IPV4 address between the routers. But when i try to ping IPV6 addresses among these routers, i am able to ping only between 2 routers and unable to ping between the other two.

I have connected the four routers in an actual switch (Cisco 3560) and it works fine as i am able to ping (IPV6) between all these 4 routers within the same LAN. But when i use Cisco 2911 with ethernet switching card then it is not working (Unable to ping (IPV6) between 2 routers).

There is no problem with IPV4 but only with IPV6 ICMP. .I have observed only the issue with IPV6 ICMP, as i can run HSR Pfor IPV6 via ethernet switch module in 2911. That means this switch card is fucntioning except for IPV6 ICMP.

Can some one please help me why the issue is only for IPV6 ICMP packets when using ethernet switch card ?

PS : Attached HLD diagram

Thanks in advance,

Anil.

Unable to ping between IPV6 addresses within the same LAN

Harold Ritter — Thu, 24 Oct 2013 13:53:13 GMT

Hi Anil,

You are most likely hitting CSCtt61762.

CSCtt61762

IPV6 multicast frames are not forwarded between ports on EHWIC-*ESG

Bear in mind that the ipv6 neighbor discovery process makes use of multicast.

Regards

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtt61762

Unable to ping between IPV6 addresses within the same LAN

anilrs3 — Thu, 24 Oct 2013 19:59:03 GMT

Hello Harold,

Many thanks for the update .

At present I am using IOS - 15.1(4)M2. I will try with more latest release and will let you know how's it going !!

Thanks again..

Regards,

Anil.

Unable to ping between IPV6 addresses within the same LAN

anilrs3 — Tue, 12 Nov 2013 19:46:56 GMT

Hello Harold,

I have tried IOS Ver 15.1(4)M5 and can perform IPV6 via the switch ports . Works fine .

Thanks a lot for the help !!

Regards,

Anil.

Re: Unable to ping between IPV6 addresses within the same LAN

Monika Nayak — Mon, 06 Nov 2017 07:14:24 GMT

I am facing the same issue with my 2960X catalyst

version

Switch Ports Model SW Version SW Image

------ ----- ----- ---------- ----------

* 1 28 WS-C2960X-24TD-L 15.2(2)E6 C2960X-UNIVERSALK9-M

Can some one help me in this ? I could not find a software update for it .