Jump to content


PIM sparse mode over FR hub and spoke


  • Please log in to reply
1 reply to this topic

#1 diya

diya

    Member

  • Members
  • PipPip
  • 93 posts

Posted 05 December 2013 - 01:47 PM

Hi  Gyus..

 

I have very simple topolgy,

 

 

bh5t1y5tnoee.jpg

 

 

 

R1 is the Hub, R2 nad R3 are spokes,

 

R2 joined to 224.10.10.10 on int loo 0

R3 will ping 224.10.10.10 from  its ser int

 

all interfaces configured with sparse-dense mode.

 

NBMA mode is enbled on the hub router although that the frame-relay supports Broadcast.

 

eigrp is the IGP between all links,

 

the fast ethernet int is currently disabled, i put it just to help me figuring out the issue, when I used it instead of serial, multicast traffic between R2 and R3 worked,

 

RP is static and installed on R1 loo0 interface

 

the problem is that when I pinged group 224.10.10.10 from R3 serial interface or even loop interface I got reply only for the first rping, then all ICMPs timed out. what happend is that R1 sends directly prune meassge to the source instantly after adding (S,G).

 

here is the PIM debug output from R1 : as it shows it is not RPF issue:

 

 

*Mar  1 01:24:52.643: PIM(0): Received v2 Join/Prune on Serial0/0 from 192.168.1.2, to us
*Mar  1 01:24:52.647: PIM(0): Join-list: (*, 224.10.10.10), RPT-bit set, WC-bit set, S-bit set
*Mar  1 01:24:52.655: PIM(0): Check RP 1.1.1.1 into the (*, 224.10.10.10) entry
*Mar  1 01:24:52.659: PIM(0): Add Serial0/0/192.168.1.2 to (*, 224.10.10.10), Forward state, by PIM *G Join
*Mar  1 01:24:52.663: PIM(0): Prune-list: (192.168.1.3/32, 224.10.10.10) RPT-bit set
R1(config-if)#
*Mar  1 01:24:59.359: PIM(0): Received v2 Join/Prune on Serial0/0 from 192.168.1.2, to us
*Mar  1 01:24:59.363: PIM(0): Join-list: (192.168.1.3/32, 224.10.10.10), RPT-bit set, S-bit set

R1(config-if)#
*Mar  1 01:25:37.431: PIM(0): Received v2 Register on Serial0/0 from 192.168.1.2
*Mar  1 01:25:37.435: PIM(0): Send v2 Register-Stop to 192.168.1.2 for 0.0.0.0, group 0.0.0.0
R1(config-if)#
*Mar  1 01:25:52.055: PIM(0): Received v2 Join/Prune on Serial0/0 from 192.168.1.2, to us
*Mar  1 01:25:52.059: PIM(0): Join-list: (*, 224.10.10.10), RPT-bit set, WC-bit set, S-bit set
*Mar  1 01:25:52.063: PIM(0): Update Serial0/0/192.168.1.2 to (*, 224.10.10.10), Forward state, by PIM *G Join
*Mar  1 01:25:52.403: PIM(0): Building Periodic (*,G) Join / (S,G,RP-bit) Prune message for 224.10.10.10


Edited by diya, 05 December 2013 - 01:50 PM.

  • 0

#2 diya

diya

    Member

  • Members
  • PipPip
  • 93 posts

Posted 05 December 2013 - 01:56 PM

R1 configs:

 

R1(config-if)#do sh run | incl ip pim
 ip pim sparse-mode
 ip pim sparse-mode
 ip pim dr-priority 2
 ip pim nbma-mode
 ip pim sparse-mode
ip pim rp-address 1.1.1.1 1

 

 

interface Serial0/0
 ip address 192.168.1.1 255.255.255.0
 ip pim dr-priority 2
 ip pim nbma-mode
 ip pim sparse-mode
 encapsulation frame-relay
 clock rate 2000000
 frame-relay map ip 192.168.1.2 102 broadcast
 frame-relay map ip 192.168.1.3 103 broadcast

 

 

 

are these all required configs to multicast to work?


Edited by diya, 05 December 2013 - 01:58 PM.

  • 0





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users