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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
Cisco Employee
Cisco Employee

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,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

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,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

View solution in original post

8 Replies 8

Harold Ritter
Cisco Employee
Cisco Employee

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,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

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,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

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,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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