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Webcast-Catalyst9k
New Member

Multicast/OTV within VRF problem

Hi,

I've been struggling making multicast work across two DC. I'm able to see the sources when I do show ip mroute, but no traffic is going between recievers and source, only I can see traffic generated from local source when I do  show ip mroute summary. I've been trying back and fourth with rp's, msdp, anycast-rp and mdt and enabled ip pim sparse-mode on all links that I know of including the update source loopback for BGP, also I have redistributed the IP's of the RP's into to BGP

The configuration snippets below are from one of the devices

Router# sh ip mroute vrf OTV
IP Multicast Routing Table for VRF "OTV"

(*, 232.0.0.0/8), uptime: 23:47:11, pim ip
  Incoming interface: Null, RPF nbr: 0.0.0.0
  Outgoing interface list: (count: 0)

(*, 239.1.1.1/32), uptime: 1d03h, ip pim igmp
  Incoming interface: loopback5, RPF nbr: 192.168.1.103
  Outgoing interface list: (count: 1)
    port-channel5, uptime: 1d01h, igmp

(10.8.6.241/32, 239.1.1.1/32), uptime: 00:03:36, pim mrib ip msdp
  Incoming interface: mti21, RPF nbr: 10.8.0.1, internal
  Outgoing interface list: (count: 1)
    port-channel5, uptime: 00:03:36, mrib

(10.8.6.245/32, 239.1.1.1/32), uptime: 00:06:26, pim mrib ip msdp
  Incoming interface: mti21, RPF nbr: 10.8.0.2
  Outgoing interface list: (count: 1)
    port-channel5, uptime: 00:06:26, mrib

(10.8.6.254/32, 239.1.1.1/32), uptime: 1d01h, ip mrib pim
  Incoming interface: port-channel5, RPF nbr: 10.8.6.254
  Outgoing interface list: (count: 1)
    port-channel5, uptime: 1d01h, mrib, (RPF)


Router# sh ip mroute su vrf OTV
IP Multicast Routing Table for VRF "OTV"

Total number of routes: 5
Total number of (*,G) routes: 1
Total number of (S,G) routes: 3
Total number of (*,G-prefix) routes: 1
Group count: 1, rough average sources per group: 3.0

Group: 232.0.0.0/8, Source count: 0
Source          packets      bytes           aps   pps       bit-rate     oifs
(*,G)           0            0               0     0         0.000   bps  0

Group: 239.1.1.1/32, Source count: 3
Source          packets      bytes           aps   pps       bit-rate     oifs
(*,G)           3            4326            1442  0         0.000   bps  1
10.8.6.241      0            0               0     0         0.000   bps  1
10.8.6.245      0            0               0     0         0.000   bps  1
10.8.6.254      4673         6757154         1445  0         5.013   kbps 2

Router# sh run vrf OTV

version 6.1(2)


vrf context OTV
  ip pim rp-address 192.168.1.103 group-list 224.0.0.0/4

  ip pim ssm range 232.0.0.0/8
  ip pim pre-build-spt
  ip msdp originator-id loopback6
  ip msdp peer 192.168.2.101 connect-source loopback6
  ip msdp peer 192.168.2.102 connect-source loopback6
  rd 65512:13
  mdt default 232.0.0.0
  no mdt enforce-bgp-mdt-safi
  address-family ipv4 unicast
    route-target import 65512:13
    route-target export 65512:13


router bgp 65512
  vrf OTV
    address-family ipv4 multicast
      redistribute direct route-map CONNECTED
    address-family ipv4 unicast
      redistribute direct route-map CONNECTED

interface loopback5
  vrf member OTV
  ip address 192.168.1.103/32
  ip pim sparse-mode

interface loopback6
  vrf member OTV
  ip address 192.168.2.103/32
  ip pim sparse-mode

interface port-channel5

  description S1-OTV-Join

  mtu 9216

  vrf member OTV

  ip address 10.8.6.253/30

  ip pim sparse-mode

  ip igmp version 3

Everyone's tags (3)
4 REPLIES
Cisco Employee

Re: Multicast/OTV within VRF problem

Hi,

Does the OTV VRF has anything to do with OTV? If yes, I remember pim can not be enabled on otv join interface.

HTH,
Lei Tian

Sent from Cisco Technical Support iPhone App

New Member

Re: Multicast/OTV within VRF problem

Hi,

thats correct we have OTV vdc connected to the core network. PIM is not enabled on the join - interface in the OTV vdc. The output above is from the core network, and the routers (VDCs) are directly connected via dark fiber so no ISP blocking multicast.

Cisco Employee

Re: Multicast/OTV within VRF problem

Hi,

Can you post the topology, and the multicast group, source IP that is in question?

HTH,

Lei Tian

New Member

Re: Multicast/OTV within VRF problem

Hi,

from the OTV vdc I have the following:

interface port-channel6

  description Join-interface

  mtu 9216

  ip address 10.8.6.254/30

  ip igmp version 3

interface Overlay1

  description Overlay interface

  otv isis authentication-type md5

  otv isis authentication key-chain xxx

  otv join-interface port-channel6

  otv control-group 239.1.1.1

  otv data-group 232.239.1.0/24

  otv extend-vlan xxx

  no shutdown

I have verified IP connectivity by pinging the different Join-interfaces from each other. OTV functiones when I've configured the overlay with unicast. The displayed multicast config from the Router above is from router in DC C. I have also attached the multicast config from DC A and B

Nexus DCv1.png

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