[Xorp-users] Multicast router: Everything is not working

[Damien Girard]

Hi all,

I am a new user to xorp, and I have few problems with it.

I am running Debian 4.0 (Etch), and I have installed the xorp package
that comes from "testing" (Ver: 1.5~cvs.20080128-1)

What I want to do is fairly simple:
- Two network. 192.168.1.0/24 and 192.168.2.0/24
- Those two networks must be able to talk together using multicast
protocol.

- eth0 is connected on network 192.168.2.0/24
- eth1 is connected on network 192.168.1.0/24

Multicast is enabled in the kernel as the Xorp manual say.

What I want to do is the following to test everything:

VLC is playing a multicast stream from one network, the another network
must show the video. The IP Address of the streaming multicast is :
239.255.0.1

------------------------------------------------
My xorp configuration file:

    protocols {
        fib2mrib {
        }
        igmp {
            interface eth0 {
                vif eth0 {
                }
            }
            interface eth1 {
                vif eth1 {
                }
            }
            traceoptions {
                flag {
                    all {
                    }
                }
            }
        }
        pimsm4 {
            interface eth0 {
                vif eth0 {
                }
            }
            interface eth1 {
                vif eth1 {
                }
            }
            bootstrap {
                cand-bsr {
                    scope-zone 224.0.0.0/4 {
                        cand-bsr-by-vif-name: "eth0"
                    }
                }
                cand-rp {
                    group-prefix 224.0.0.0/4 {
                        cand-rp-by-vif-name: "eth0"
                    }
                }
            }
            switch-to-spt-threshold {
                bytes: 102400
            }
            traceoptions {
                flag {
                    all {
                    }
                }
            }
        }
    }
    fea {
        unicast-forwarding4 {
            forwarding-entries {
            }
        }
    }
    interfaces {
        interface eth0 {
            description: "Ethernet Interface #1"
            default-system-config
       }
        interface eth1 {
            description: "Ethernet Interface #2"
            default-system-config
        }
    }
    plumbing {
        mfea4 {
            interface eth0 {
                vif eth0 {
                }
            }
            interface eth1 {
                vif eth1 {
                }
            }
            interface "register_vif" {
                vif "register_vif" {
                }
            }
            traceoptions {
                flag {
                    all {
                    }
                }
            }
        }
    }

------------------------------------------------
root at R1> show interfaces 

eth0/eth0: Flags:<ENABLED,BROADCAST,MULTICAST> mtu 1500
        inet 192.168.2.1 subnet 192.168.2.0/24 broadcast 192.168.2.255
        physical index 2
        ether 0:80:82:49:52:c2
eth1/eth1: Flags:<ENABLED,BROADCAST,MULTICAST> mtu 1500
        inet 192.168.1.109 subnet 192.168.1.0/24 broadcast 192.168.1.255
        physical index 1
        ether 0:80:82:49:52:c3

Multicast seem to be enabled on all interfaces.

------------------------------------------------
root at R1> show mfea interface 

Interface    State    Vif/PifIndex Addr            Flags
eth0         UP                0/2 192.168.2.1     MULTICAST BROADCAST
KERN_UP
eth1         UP                1/1 192.168.1.109   MULTICAST BROADCAST
KERN_UP
register_vif UP                2/2 192.168.2.1     PIM_REGISTER KERN_UP

------------------------------------------------
root at R1> show mfea dataflow 

Group
Source                                 
224.0.1.24
192.168.1.3                            
  Measured(Start|Packets|Bytes) Type Thresh(Interval|Packets|Bytes)
Remain
  3540.952097|0|?               <=     210.0|0|?
93.77190
239.255.0.1
192.168.1.101                          
  Measured(Start|Packets|Bytes) Type Thresh(Interval|Packets|Bytes)
Remain
  3610.112892|68960|?           <=     210.0|0|?
162.237985


239.255.0.1 is VLC Media player that is sending multicast packet on the
network. So it detects it.

------------------------------------------------
root at R1> show pim join
239.255.0.1     192.168.1.101   192.168.2.1     SG DirectlyConnectedS 
    Upstream interface (S):    eth1
    Upstream interface (RP):   UNKNOWN
    Upstream MRIB next hop (RP): UNKNOWN
    Upstream MRIB next hop (S):  UNKNOWN
    Upstream RPF'(S,G):        UNKNOWN
    Upstream state:            NotJoined 
    Register state:            RegisterNoinfo RegisterNotCouldRegister 
    Join timer:                -1
    KAT(S,G) running:          true
    Local receiver include WC: ...
    Local receiver include SG: ...
    Local receiver exclude SG: ...
    Joins RP:                  ...
    Joins WC:                  ...
    Joins SG:                  ...
    Join state:                ...
    Prune state:               ...
    Prune pending state:       ...
    I am assert winner state:  ...
    I am assert loser state:   ...
    Assert winner WC:          ...
    Assert winner SG:          ...
    Assert lost WC:            ...
    Assert lost SG:            ...
    Assert lost SG_RPT:        ...
    Assert tracking SG:        ...
    Could assert WC:           ...
    Could assert SG:           ...
    I am DR:                   OOO
    Immediate olist RP:        ...
    Immediate olist WC:        ...
    Immediate olist SG:        ...
    Inherited olist SG:        ...
    Inherited olist SG_RPT:    ...
    PIM include WC:            ...
    PIM include SG:            ...
    PIM exclude SG:            ...


As you seen, it really see the multicast. I do not know how interpret
this result as I am not a network engineer.

------------------------------------------------

So, what I am asking is how make this configuration working. I navigated
through the entire documentation multiple time and I did not found
anything that helped me.

Regards,

--
Damien Girard
Software Engineer
Odyssee Systemes.