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Issues with IPv6 ND NS

Issues with IPv6 ND NS

Alexandr_P
Contributor III

Hello!

 

ASR CISCO<--->X460<--->X670/1<--->X8<--->X670/2<--->Second Router

ND isn’t forwarded between ASR and other end Router,  feelings that multicast is somewhere lost.

IPv6 configured on Routers.

EXOS switches as transit nodes (no neighbors, no cache) - only forward traffic in 1 VLAN.

EXOS versions is 16.2.5.4-patch1-5

Ping from X8 to both X670 work fine.

 

Ping from X8 to X460 doesn’t work.

X8# ping 2222:6d5:4f::1

Ping(ICMP6) 2222:6d5:4f::1: 4 packets, 8 data bytes, interval 1 second(s).

 

--- 2222:6d5:4f::1 ping statistics ---

4 packets transmitted, 0 packets received, 100% loss round-trip min/avg/max = 0/0/0 ms

 

Outbound packets go out from X8 to X460, from X460 to X8 - no.

 

If made ACL on X670 as ingress (from X460):

entry any_v6 {

   if {

      source-address 0:: / 0;

   }

   then {

      log;

      mirror-cpu;

      count ND;

      permit;

   }

}

Packets coming

670/1# sh log | inc "33:33"

04/01/2020 13:55:09.74 <Info:Kern.Info> 70:81:05:26:77:00 -> 33:33:ff:00:01:23 IPv6

04/01/2020 13:55:09.74 <Info:Kern.Info> 70:81:05:26:77:00 -> 33:33:ff:00:01:05 IPv6

04/01/2020 13:54:34.79 <Info:Kern.Info> 70:81:05:26:77:00 -> 33:33:ff:00:00:16 IPv6

04/01/2020 13:54:24.62 <Info:Kern.Info> 70:81:05:26:77:00 -> 33:33:ff:00:01:72 IPv6

 

If configure same ACL on X8 on ingress (from X670) - there is no packets.

 

Any ideas?

 

Thank you!

2 REPLIES 2

Alexandr_P
Contributor III

Hello, Nikolay!

 

Thank you!

Necheporenko__N
Extreme Employee

Hello Alexandr, 

If ICMPs are seen on ingress but do not on egress X670G1 and ports are not congested, it might be a case of parity error issue. Switch reboot is a solution.

 

Best Regards,

Nikolay  

GTM-P2G8KFN