[Xorp-users] Fwd: underlying vif is not UP

[hilal chouman]

I was not aware of the "fib2mrib". I'll enable it and see what happens.
Now i am doing the same configuration steps for a second router R2 (so that
I can include 2 routes instead of 1 in between the source and the
destination node.)

*CS--R1--R2--Destination*

but I got another error related to vif which is th following:
*10 command failed cannot enable vif rl0 no such vif*

I checked that the interfaces are enabled, everything is ok, and the ip
addresses are configured correctly with no conflict with the pre-configured
ips on windows. Moreover there is connection . I can ping (using a network
analyzer in the destination node) from the destination to both interfaces of
R2. Note that rl0 is the interface of R2 to the left, that is the interface
of R2 that connects to R1.
A last note, this error occurs when I try to commit the changes only after
the configuration of mfea4.
Any ideas what might be the reason for that?

Now when I go to such setup (2 routers in between), is itbetter to use the
CandBSR/CandRP  mechanismor the static RP is ok?

As for your other remarks, I'll check them and tell you back what happened.
Thanks again Pavlin!!

regards,
Hilal


On 10/20/06, Pavlin Radoslavov <pavlin at icir.org> wrote:
>
> > For the multicast forwarding, I still have a slight problem, my network
> > looks like this:
> >
> > Content server <-------->multicast enabled router (xorp) <-------->
> > destination
> >
> > I have network analyzers on both the server and the destination, I was
> able
> > to see PIM-SM hello messages on the destination machine but there is no
> > reply.
>
> What do you mean by "there is no reply". The PIM Hello messages are
> just send periodically on each interface, and in PIM-SM there are no
> reply messages or anything like this.
>
> > Basically I was configuring the rp statically, but ten changed it to
> > candidate BSR/candidate RP option, nothing changed.
> > I thought that it is because I ahve one router only, the routing is not
> > successful, I am trying to configure another router and add it between
> the
> > content server and the destination so that I  have 2 enabled routers in
> > between.
>
> If you have a single PIM-SM router, then the simplest setup is to
> configure it as a static RP (as you probably have tried already).
> In addition to PIM-SM you need to have mfea, igmp, and fib2mrib
> configured as well. Also, make sure that your kernel has multicast
> forwarding enabled. The XORP User Manual has information about this
> for eash supported OS (Section 13.3.1).
>
> If everything is configed correctly, you should see the static RP by
> using the "show pim rps" xorpsh command.
> The "show igmp group" command should show the multicast group
> membership on each interface.
> The "show pim join" command should show you the PIM-SM multicast
> routing entries.
> The "show pim mfc" command should show the multicast forwarding
> entries.
>
> If the IGMP and PIM-SM state is correct, but you still don't see
> multicast traffic being forwarded, make sure that the sender's TTL
> of the multicast packets is > 1.
>
> > Now, honestly the idea of the candidate BSR/candidate RP is not obvious
> for
> > me. Any body has informaton on that? and where might be the problem??
>
> The CandBSR/CandRP mechanism is used for dynamically distributing
> the RP Set information across a PIM-SM domain. In your setup it will
> be simpler to use a static RP.
>
> Regards,
> Pavlin
>



-- 
Hilal Chouman
هلال شومان
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