[Xorp-users] help please my multicasting is not working

[GDS.Marshall]

On Thu, 17 January, 2008 8:54 pm, Pavlin Radoslavov wrote:
> GDS.Marshall <gdsm at tgfslp.dalmany.co.uk> wrote:
>
>> I have read the xorp documentation (including that on multicasting), I
>> have looked at the example configuration for multicasting, I have
>> googled
>> till the cows come home, I have read the mailing list, even back as far
>> as
>> 2005, but for the life of me I can not get this working.
>
> The reason it didn't work for you is very simple.
> Mtrace requires special support from the multicast routers, and
> currently the XORP implementation doesn't contain it.

So all my diagnosing was wasted :(

The reason for trying mtrace was the fact my multicast is not working.  I
can not view/listen to any multicast streams.  Neither do dbeacon or
ssmping work from a multicast point of view.

Would anyone have any suggestions on what to check or change etc.
please?

>>
>> ISP ---- cisco 1700 ---- linux xorp ---- LAN
>>         DSL        ^     ^         ^        ^
>>        82.70.154.150     |    192.168.4.3   192.168.4.0/24
>>                  82.70.154.145
>>
>> on the cisco 1700 if I do an mtrace, it succeeds.
>> mtrace 81.20.48.1 82.70.154.145 233.153.34.2
>> Type escape sequence to abort.
>> Mtrace from 81.20.48.1 to 82.70.154.145 via group 233.153.34.2
>> From source (master1.gcapmedia.net) to destination (ns0.dalmany.co.uk)
>> Querying full reverse path...
>>  0  spitfire.tgfslp.dalmany.co.uk (82.70.154.145)
>> -1  gatekeeper.dalmany.co.uk (82.70.154.150) PIM  [default]
>> -2  master1.gcapmedia.net (81.20.48.1)
>>
>> If I run mtrace from a laptop on the 192.168.4.0/24 network
>> /usr/local/bin/mtrace 81.20.48.1 192.168.4.50 233.153.34.2
>> Mtrace from 81.20.48.1 to 192.168.4.50 via group 233.153.34.2
>> Querying full reverse path... * switching to hop-by-hop:
>>   0  hp-laptop.local (192.168.4.50)
>>  -1  * * *
>>  -2  * * *
>>  -3  * * *
>>  -4  * * * ...giving up
>> Timed out receiving responses
>> Perhaps no local router has a route for source 81.20.48.1
>>
>> but if I look in xorp, it does
>> xorpsh> show route table ipv4 multicast final
>> 0.0.0.0/0       [fib2mrib(254)/65535]
>>                 > to 82.70.154.150 via eth1/eth1
>> 192.168.4.0/24  [connected(0)/0]
>>                 > via eth0/eth0
>> 82.70.154.144/29        [connected(0)/0]
>>                 > via eth1/eth1
>>
>> next I tried mtrace from the outside interface of the linux xorp
>> /usr/local/bin/mtrace 81.20.48.1 82.70.154.145 233.153.34.2
>> Mtrace from 81.20.48.1 to 82.70.154.145 via group 233.153.34.2
>> Querying full reverse path... * switching to hop-by-hop:
>>   0  spitfire.tgfslp.dalmany.co.uk (82.70.154.145)
>>  -1  * * *
>>  -2  * * *
>>  -3  * * *
>>  -4  * * * ...giving up
>> Timed out receiving responses
>> Perhaps no local router has a route for source 81.20.48.1
>>
>> Here are a few show commands and results
>> xoprsh> show pim neighbors
>> Interface    DRpriority NeighborAddr    V Mode   Holdtime Timeout
>> eth1                  1 82.70.154.150   2 Sparse      105      98
>>
>> xorpsh> show pim interface
>> Interface    State    Mode   V PIMstate Priority DRaddr
>> Neighbors
>> eth0         UP       Sparse 2 DR              1 192.168.4.3
>> 0
>> eth1         UP       Sparse 2 NotDR           1 82.70.154.150
>> 1
>> register_vif UP       Sparse 2 DR              1 192.168.4.3
>> 0
>>
>> why is eth1 "NotDR?"
>>
>> xorpsh> show pim mrib
>> DestPrefix         NextHopRouter   VifName VifIndex MetricPref Metric
>> 0.0.0.0/0          82.70.154.150   eth1    1               254  65535
>> 82.70.154.144/29   82.70.154.145   eth1    1                 0      0
>> 192.168.4.0/24     192.168.4.3     eth0    0                 0      0
>>
>> xorpsh> ping 224.0.0.1
>> PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
>> 64 bytes from 82.70.154.150: icmp_seq=1 ttl=255 time=1.08 ms
>> 64 bytes from 82.70.154.150: icmp_seq=2 ttl=255 time=1.05 ms
>>
>> xorpsh> ping 224.0.0.13
>> PING 224.0.0.13 (224.0.0.13) 56(84) bytes of data.
>> 64 bytes from 82.70.154.150: icmp_seq=1 ttl=255 time=1.07 ms
>> 64 bytes from 82.70.154.150: icmp_seq=2 ttl=255 time=1.07 ms
>>
>> xorpsh> show pim rps
>> RP              Type      Pri Holdtime Timeout ActiveGroups GroupPrefix
>>
>> (i.e. there are none)
>>
>> Here is my configuration.
>> /*
>> <snip comments>
>> */
>> interfaces {
>>     interface eth0 {
>>         default-system-config
>>     }
>>     interface eth1 {
>>         default-system-config
>>     }
>> }
>>
>> plumbing {
>>     mfea4 {
>>         interface eth0 {
>>             vif eth0 {
>>                 disable: false
>>             }
>>         }
>>         interface eth1 {
>>             vif eth1 {
>>                 disable: false
>>             }
>>         }
>>         interface register_vif {
>>             vif register_vif {
>>                 disable: false
>>             }
>>         }
>>     }
>> }
>>
>> protocols {
>>     igmp {
>>         interface eth0 {
>>             vif eth0 {
>>                 disable: false
>>             }
>>         }
>>         interface eth1 {
>>             vif eth1 {
>>                 disable: false
>>             }
>>         }
>>     }
>>
>>     pimsm4 {
>>         interface eth0 {
>>             vif eth0 {
>>                 disable: false
>>             }
>>         }
>>         interface eth1 {
>>             vif eth1 {
>>                 disable: false
>>             }
>>         }
>>         interface register_vif {
>>             vif register_vif {
>>                 disable: false
>>             }
>>         }
>>     }
>>
>>     fib2mrib {
>>         disable: false
>>     }
>> }
>>
>> Many thanks in advance,
>>
>> Spencer
>>
>>
>> _______________________________________________
>> Xorp-users mailing list
>> Xorp-users at xorp.org
>> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/xorp-users
>