Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Multicast and gated (3.6alpha_1)

10 views
Skip to first unread message

Dave Alden

unread,
May 30, 1996, 3:00:00 AM5/30/96
to

Hi,

I was using gated (3.6alpha_1) as a "drop-in" replaced for Sun's routed --
I've got a Sun with 2 ethernet cards with the department ethernet on one and
~45 suns behind the other. I used to run mrouted to get a multicast tunnel
inside the subnet. Now our campus routers are passing multicast packets, so
I've got the packets on the department ethernet. Now I'd like to quick using
the tunnel and just have gated pass the packets to my Sun subnet.

I tried turning PIM on, but it isn't working correctly. It seems to work
ok between the department ethernet and the Sun subnet (I can run vat on the
2 networks and talk back and forth). vat on the department network works
to anywhere in the world, but vat on the Sun subnet only sees people running
on the department network. The most common error I'm getting is:

May 30 00:41:27 mathserv gated[7654]: task_set_option: task IGMP socket 8 option MulticastDelMFC(23) group 224.2.0.1 source 128.146.116.12: Cannot assign requested address

Any suggestions?

...dave

ps Here's my gated.conf (note that 110 is the department network and 111
is my Sun subnet):

#
rip yes;

igmp yes;

pim yes {
interface 128.146.110.31 enable;
interface 128.146.111.31 enable;
};

static
{
default gateway 128.146.110.1 preference 10 retain;
};

Tom Pusateri

unread,
May 31, 1996, 3:00:00 AM5/31/96
to

In message <1996053015...@math.mps.ohio-state.edu> you write:
>Hi,
>
> I was using gated (3.6alpha_1) as a "drop-in" replaced for Sun's routed --
>I've got a Sun with 2 ethernet cards with the department ethernet on one and
>~45 suns behind the other. I used to run mrouted to get a multicast tunnel
>inside the subnet. Now our campus routers are passing multicast packets, so
>I've got the packets on the department ethernet. Now I'd like to quick using
>the tunnel and just have gated pass the packets to my Sun subnet.
>
> I tried turning PIM on, but it isn't working correctly. It seems to work
>ok between the department ethernet and the Sun subnet (I can run vat on the
>2 networks and talk back and forth). vat on the department network works
>to anywhere in the world, but vat on the Sun subnet only sees people running
>on the department network.

I assume you are running PIM on the department network. You need an
ipmulti 3.5 based kernel. Also, know that PIM asserts are broken
in this kernel. If you have parallel paths, you will see duplicates.
See Bill Fenner for a patch.

First of all, make sure it is dense mode PIM on that network.
Sparse mode pim is not supported in gated.

Next, see if the sun running gated pim sees any other pim routers and
vice versa (the cisco routers bringing multicast into the department
network see the sun). With gated, you can take a gated dump and see
the pim neighbor list. I don't remember the command for the cisco.

Next, you'll have to look at the prune state for particular groups
you are interested in and the state of the forwarding cache in the kernel.
Most of this should also be in the gated dump.

Tom

0 new messages