[Xorp-users] Mcast issues

Patricio Latini p_latini at hotmail.com
Fri Sep 16 21:21:47 PDT 2011


 

I have done some extra troubleshooting,  have the show igmp group where it
shows that there are igmp joins from 239.3.0.1 in both vlan15 and vlan31
however in the mr_cache shows only one output interface 11:1 (vlan31).

 

root at dns> show igmp group 

Interface    Group           Source          LastReported Timeout V State

vlan12       224.0.0.2       0.0.0.0         172.16.1.9        24 2     E

vlan12       224.0.0.5       0.0.0.0         172.16.1.9        19 2     E

vlan12       224.0.0.6       0.0.0.0         172.16.1.9        29 2     E

vlan12       224.0.0.13      0.0.0.0         172.16.1.9        28 2     E

vlan12       224.0.0.22      0.0.0.0         172.16.1.9        26 2     E

vlan12       224.0.0.251     0.0.0.0         172.16.1.9        15 2     E

vlan15       224.0.0.2       0.0.0.0         172.16.1.21       16 2     E

vlan15       224.0.0.5       0.0.0.0         172.16.1.21       24 2     E

vlan15       224.0.0.6       0.0.0.0         172.16.1.21       25 2     E

vlan15       224.0.0.22      0.0.0.0         172.16.1.21       16 2     E

vlan15       224.0.0.251     0.0.0.0         172.16.1.21       18 2     E

vlan15       239.3.0.1       0.0.0.0         172.16.1.22       16 2     E

vlan30       224.0.0.2       0.0.0.0         172.16.4.1        28 3     E

vlan30       224.0.0.13      0.0.0.0         172.16.4.1        28 3     E

vlan30       224.0.0.22      0.0.0.0         172.16.4.1        28 3     E

vlan30       224.0.0.251     0.0.0.0         172.16.4.1        28 3     E

vlan31       224.0.0.2       0.0.0.0         172.16.5.1        19 2     E

vlan31       224.0.0.13      0.0.0.0         172.16.5.1        19 2     E

vlan31       224.0.0.22      0.0.0.0         172.16.5.1        24 2     E

vlan31       224.0.0.251     0.0.0.0         172.16.5.1        27 2     E

vlan31       239.3.0.1       0.0.0.0         172.16.5.2        28 2     E

root at dns> show igmp interface 

Interface    State    Querier         Timeout Version Groups

eth0         DISABLED 0.0.0.0            None       2      0

vlan10       DISABLED 172.16.1.1         None       2      0

vlan11       DISABLED 172.16.1.5         None       2      0

vlan12       UP       172.16.1.9         None       2      6

vlan13       DISABLED 172.16.1.13        None       2      0

vlan14       DISABLED 172.16.1.17        None       2      0

vlan15       UP       172.16.1.21        None       2      6

vlan18       DISABLED 0.0.0.0            None       2      0

vlan19       DISABLED 0.0.0.0            None       2      0

vlan20       DISABLED 172.16.3.1         None       2      0

vlan30       UP       172.16.4.1         None       3      4

vlan31       UP       172.16.5.1         None       2      5

root at dns> exit

root at dns:~# cat /proc/net/ip_mr_vif

Interface      BytesIn  PktsIn  BytesOut PktsOut Flags Local    Remote

3 vlan12            0       0         0       0 00000 090110AC 00000000

6 vlan15            0       0         0       0 00000 150110AC 00000000

10 vlan30     356427750 9852609         0       0 00000 010410AC 00000000

11 vlan31            0       0  890386048 7053810 00000 010510AC 00000000

root at dns:~# cat /proc/net/ip_mr_cache

Group    Origin   Iif     Pkts    Bytes    Wrong Oifs

010002EF 0E0410AC 10   1129162 1517593728        0

010003EF 0A0410AC 10   8763936 3188795392        0 11:1  

0100FFE5 FE0410AC 10       476    60452        0

 

-----Original Message-----
From: xorp-users-bounces at xorp.org [mailto:xorp-users-bounces at xorp.org] On
Behalf Of Patricio Latini
Sent: Friday, September 16, 2011 4:14 PM
To: 'Ben Greear'
Cc: xorp-users at xorp.org
Subject: Re: [Xorp-users] Mcast issues

 

I have upgraded to 1.8.4 and still have the traffic being flooded to only
one interface.

 

Patricio

 

-----Original Message-----

From: Ben Greear [mailto:greearb at candelatech.com]

Sent: Friday, September 16, 2011 1:12 PM

To: Patricio Latini

Cc: 'Garry Peirce'; xorp-users at xorp.org

Subject: Re: [Xorp-users] Mcast issues

 

On 09/16/2011 07:44 AM, Patricio Latini wrote:

> Garry, thanks for your response, I changed the groups to all of them 

> in the 239.x.x.x range however the behaivior is the same. Do you know 

> any

useful command to troubleshoot this?

 

There are definitely bugs in 1.8.3, so please make sure you try the 1.8.4 or
compile from latest github source tree (which is 1.8.4).

 

We've been testing ipv4 multicast lately and it works for us.  We are having
troubles with IPv6, but not sure if it's xorp related yet...

 

As always, make sure your generator has TTL high enough..it's usually 1 by
default which will not route.

 

Thanks,

Ben

 

> 

> Patricio

> 

> xorp at dns> show pim mfc

> 

> Group Source RP

> 

> 229.255.0.1 172.16.4.254 0.0.0.0

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: ............O

> 

> 239.1.0.1 172.16.4.254 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: .............

> 

> 239.2.0.1 172.16.4.14 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: .............

> 

> 239.3.0.1 172.16.4.10 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: ...........O.

> 

> xorp at dns> show pim mfc

> 

> Group Source RP

> 

> 229.255.0.1 172.16.4.254 0.0.0.0

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: ............O

> 

> 239.1.0.1 172.16.4.254 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: .............

> 

> 239.2.0.1 172.16.4.14 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: .............

> 

> 239.3.0.1 172.16.4.10 172.16.1.9

> 

> Incoming interface : vlan30

> 

> Outgoing interfaces: ...........O.

> 

> xorp at dns> show igmp group

> 

> Interface Group Source LastReported Timeout V State

> 

> vlan12 224.0.0.2 0.0.0.0 172.16.1.9 28 2 E

> 

> vlan12 224.0.0.5 0.0.0.0 172.16.1.9 20 2 E

> 

> vlan12 224.0.0.6 0.0.0.0 172.16.1.9 19 2 E

> 

> vlan12 224.0.0.13 0.0.0.0 172.16.1.9 28 2 E

> 

> vlan12 224.0.0.22 0.0.0.0 172.16.1.9 27 2 E

> 

> vlan12 224.0.0.251 0.0.0.0 172.16.1.9 28 2 E

> 

> vlan15 224.0.0.2 0.0.0.0 172.16.1.21 29 2 E

> 

> vlan15 224.0.0.5 0.0.0.0 172.16.1.21 25 2 E

> 

> vlan15 224.0.0.6 0.0.0.0 172.16.1.21 26 2 E

> 

> vlan15 224.0.0.22 0.0.0.0 172.16.1.21 24 2 E

> 

> vlan15 224.0.0.251 0.0.0.0 172.16.1.21 26 2 E

> 

> vlan15 239.3.0.1 0.0.0.0 172.16.1.22 23 2 E

> 

> vlan30 224.0.0.2 0.0.0.0 172.16.4.1 28 3 E

> 

> vlan30 224.0.0.13 0.0.0.0 172.16.4.1 28 3 E

> 

> vlan30 224.0.0.22 0.0.0.0 172.16.4.1 28 3 E

> 

> vlan30 224.0.0.251 0.0.0.0 172.16.4.1 28 3 E

> 

> vlan31 224.0.0.2 0.0.0.0 172.16.5.1 25 2 E

> 

> vlan31 224.0.0.13 0.0.0.0 172.16.5.1 29 2 E

> 

> vlan31 224.0.0.22 0.0.0.0 172.16.5.1 23 2 E

> 

> vlan31 224.0.0.251 0.0.0.0 172.16.5.1 27 2 E

> 

> vlan31 239.3.0.1 0.0.0.0 172.16.5.2 21 2 E

> 

> xorp at dns> show igmp interface

> 

> Interface State Querier Timeout Version Groups

> 

> eth0 DISABLED 0.0.0.0 None 2 0

> 

> vlan10 DISABLED 172.16.1.1 None 2 0

> 

> vlan11 DISABLED 172.16.1.5 None 2 0

> 

> vlan12 UP 172.16.1.9 None 2 6

> 

> vlan13 DISABLED 172.16.1.13 None 2 0

> 

> vlan14 DISABLED 172.16.1.17 None 2 0

> 

> vlan15 UP 172.16.1.21 None 2 6

> 

> vlan18 DISABLED 0.0.0.0 None 2 0

> 

> vlan19 DISABLED 0.0.0.0 None 2 0

> 

> vlan20 DISABLED 172.16.3.1 None 2 0

> 

> vlan30 UP 172.16.4.1 None 3 4

> 

> vlan31 UP 172.16.5.1 None 2 5

> 

> *From:*xorp-users-bounces at xorp.org

>  <mailto:[mailto:xorp-users-bounces at xorp.org]>
[mailto:xorp-users-bounces at xorp.org] *On Behalf Of *Garry Peirce

> *Sent:* Friday, September 16, 2011 11:13 AM

> *To:*  <mailto:xorp-users at xorp.org> xorp-users at xorp.org

> *Subject:* Re: [Xorp-users] Mcast issues

> 

> Just a general comment/suggestion re: mcast issues.

> 

> If you are experiencing mcast issues it is very difficult for anyone 

> to

provide insight when the entire picture is not supplied.

> 

> Help others help you - provide your XORP config (anonymize addressing

consistently if you need to) , the entire relevant topology, and
IGMP/PIM/MFEA state.

> 

> Otherwise it can result in numerous back/forth messages to try and get 

> the full picture and those assisting may become disinterested or 

> available in continuing to help solve your issue. I suppose this holds

true for any type of problem, but mcast is enough of a different bird that
it certainly helps to provide as much info as possible.

> 

> Oren: perhaps your routers have some PIM adjacency/RP/mapping issue so

traffic cannot reach the RP.

> 

> [ 2011/09/15 14:28:14.465824 WARNING xorp_pimsm4 PIM ]

> JoinDesired(S,G) = false: upstream neighbor for source 10.0.0.1 and 

> group 224.5.6.7: not found

> 

> Patricio: you show some IGMP info but nothing of PIM state. I'd change 

> your addressing to avoid 32:1 overlap. The addresses you chose to use 

> for two different services will end up using the same L2 address which 

> may

make other troubleshooting more difficult as well as pass both streams to
all participating NICs only to be dropped. Sensing your addressing did not
actually have SSM/GLOP needs, you might move these, for example, into the
239.x.x.x block.

> 

> 

> 

> _______________________________________________

> Xorp-users mailing list

>  <mailto:Xorp-users at xorp.org> Xorp-users at xorp.org

>  <http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users>
http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users

 

 

--

Ben Greear < <mailto:greearb at candelatech.com> greearb at candelatech.com>

Candela Technologies Inc   <http://www.candelatech.com>
http://www.candelatech.com

 

 

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