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IPv6 Multicast question

gongya001
Level 1
Level 1

IPv6 Mroute.JPG

Receiver joins FF0E::1 group

R5 (RP) has the following:

RP#show ipv6 mroute | b 5:5:5:5
(*, FF0E::1), 11:04:45/00:02:50, RP 2005::5:5:5:5, flags: S
  Incoming interface: Tunnel2
  RPF nbr: 2005::5:5:5:5
  Immediate Outgoing interface list:
    Ethernet0/3, Forward, 11:04:45/00:02:50

R1 has the following:

R1#show ipv6 pim range-list
Static SSM Exp: never Learnt from : ::
  FF33::/32 Up: 2d22h
  FF34::/32 Up: 2d22h
  FF35::/32 Up: 2d22h
  FF36::/32 Up: 2d22h
  FF37::/32 Up: 2d22h
  FF38::/32 Up: 2d22h
  FF39::/32 Up: 2d22h
  FF3A::/32 Up: 2d22h
  FF3B::/32 Up: 2d22h
  FF3C::/32 Up: 2d22h
  FF3D::/32 Up: 2d22h
  FF3E::/32 Up: 2d22h
  FF3F::/32 Up: 2d22h
Static SM RP: 2005::5:5:5:5 Exp: never Learnt from : ::
  FF00::/8 Up: 2d11h

After Sender ping FF0E::1

Sender#ping ipv6 FF0E::1
Output Interface: ethernet0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FF0E::1, timeout is 2 seconds:
Packet sent with a source address of 2001:192:168::6

Request 0 timed out
Request 1 timed out
Request 2 timed out
Request 3 timed out
Request 4 timed out
Success rate is 0 percent (0/5)
0 multicast replies and 0 errors.

R1 has the following:

R1#show ipv6 mroute | b FF0E
(2001:192:168::6, FF0E::1), 00:00:11/00:03:18, flags: SP
  Incoming interface: Ethernet0/0
  RPF nbr: FE80::A8BB:CCFF:FE00:600
  Outgoing interface list: Null

 

R1#ping 2005::5:5:5:5 re 1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 2005::5:5:5:5, timeout is 2 seconds:
!

R1#ping FF0E::1
Output Interface: ethernet0/2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FF0E::1, timeout is 2 seconds:
Packet sent with a source address of 2001:172:16:14::1

Reply to request 0 received from 2001:192:166:1::7, 40 ms

Success rate is 100 percent (1/1), round-trip min/avg/max = 1/1/1 ms

My question is why R1 fails to send ping packets .

 

Any help is appreciated !!

 

2 Accepted Solutions

Accepted Solutions

Harold Ritter
Spotlight
Spotlight

Do you have "ipv6 multicast-routing" enabled on the sender as well by any chance? If so, can you disable it and do the test once again.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)

View solution in original post

I'm glad it fixed it. The issue is that the IOS is used as a host in your topology. When you configure it with "ipv6 multicast-rounting", you basically use it as a router rather than a host from the PIM point of view and this will cause all kind of issues.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)

View solution in original post

8 Replies 8

Harold Ritter
Spotlight
Spotlight

Do you have "ipv6 multicast-routing" enabled on the sender as well by any chance? If so, can you disable it and do the test once again.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)

Sender#show run | i ipv6
ipv6 unicast-routing
ipv6 cef
ipv6 multicast-routing
 ipv6 address 2006::6:6:6:6/128
 ipv6 address 2001:192:168::6/64
 ipv6 enable
 address-family ipv6 unicast autonomous-system 10

 

Sender#ping ipv6 FF0E::1 re 1
Output Interface: ethernet0/0
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to FF0E::1, timeout is 2 seconds:
Packet sent with a source address of 2001:192:168::6

Request 0 timed out
Success rate is 0 percent (0/1)
0 multicast replies and 0 errors.

 

R1#show ipv6 mroute | b FF0E
(2001:192:168::6, FF0E::1), 00:01:11/00:02:17, flags: SP
  Incoming interface: Ethernet0/0
  RPF nbr: FE80::A8BB:CCFF:FE00:600
  Outgoing interface list: Null

 

I do have ipv6 multicast-routing on Sender.

I will remove it.

 

thanks a lot !!

 

Sorry I do have. Let me remove it.

 

 

It worked after I removed it.

 

thanks so much for help !!!

I'm glad it fixed it. The issue is that the IOS is used as a host in your topology. When you configure it with "ipv6 multicast-rounting", you basically use it as a router rather than a host from the PIM point of view and this will cause all kind of issues.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)

many thanks !!

I can move on for IPv6 multicast topic now !!

gongya001
Level 1
Level 1

thanks for your help !!

you are very welcome.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)