[Xorp-users] Testing XORP in a Multicasting Environment

[Pavlin Radoslavov]

Vikram <vikram.dhir at gmail.com> wrote:

> I am trying to run XORP with your configuration but XORP exits giving
> some errors. The errors are attached with this mail.

The problematic error is the following:

[ 2006/12/12 12:04:58 INFO xorp_fea MFEA ] Interface enabled
Vif[eth1] pif_index: 3 vif_index: 1 addr: 192.168.1.1 subnet: 192.168.1.0/24
broadcast: 192.168.1.255 peer: 0.0.0.0 Flags: MULTICAST BROADCAST
MTU: 1500 DOWN IPv4 ENABLED
[ 2006/12/12 12:04:58  ERROR xorp_fea:4919 MFEA +910 mfea_node.cc
start_vif ] Cannot start vif eth1: underlying vif is not UP

Please make sure that the eth1 interface is UP before starting XORP.
Alternatively, explicitly configure the IP address of that interface
inside the XORP configuration. See the XORP user manual for details
how to do that.

Regards,
Pavlin


> 
> On 12/11/06, Pavlin Radoslavov <pavlin at icir.org> wrote:
> > > I am trying to run XORP in a multicasting environment. I m using RH9
> > > and my PC is on a LAN. I m running XORP on my PC. Whats the minimum
> > > configuration required to do that? and how do I test that multicasting
> > > is working fine? Do I have to make changes in the default kernel?
> >
> > It is not clear from your email whether your PC is connected to 2+
> > LANs and will serve as a multicast router, or whether it is a leaf
> > node connected to a single LAN segment. If the latter, then it is
> > unclear what purpose your PC will have on that LAN, because some
> > other node is suppose to be the multicast router for that LAN.
> >
> > Anyway, at the end of this email is a sample configuration that
> > enables IGMP and PIM-SM. The configuration assumes:
> > 1. There are two network interfaces (eth0 and eth1), and those
> >    interfaces have configured IP addresses before starting XORP.
> > 2. The IP address of one of the interfaces is 10.0.0.1.
> >
> > See the XORP user manual for configuration details.
> >
> > To test whether the multicast routing is working, start a multicast
> > sender and a multicast receiver (on separate LANs interconnected by
> > the multicast routers). However, make sure the TTL of the sender is
> > large enough to reach the receiver (the default multicast TTL is 1).
> >
> > In general, the PIM-SM support must be enabled in the UNIX kernel.
> > Though, I don't know whether the RedHat 9 kernel has PIM-SM support
> > enabled by default. If the PIM-SM support is not enabled, then see
> > Section 13.3 "Configuring PIM-SM" in the XORP user manual regarding
> > the kernel configuration options you need to enable before
> > recompiling your kernel.
> >
> > Regards,
> > Pavlin
> >
> > ================================================================
> >
> > 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
> >             }
> >         }
> >
> > 	static-rps {
> > 	    rp 10.0.0.1 {
> > 		group-prefix 224.0.0.0/4 {
> > 		}
> > 	    }
> > 	}
> >     }
> >
> >     fib2mrib {
> >         disable: false
> >     }
> > }
> >
> > ================================================================
> >
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