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Date: Sat, 3 Jan 1998 14:09:55 -0800 (PST)
From: borjamar@sarenet.es
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Subject: bin/5422: Userland PPP with aliasing enabled and mrouted tunnel don't work
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>Number:         5422
>Category:       bin
>Synopsis:       Userland PPP with aliasing enabled and mrouted tunnel don't work
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jan  3 14:10:00 PST 1998
>Last-Modified:
>Originator:     Borja Marcos
>Organization:
>Release:        2.2.5-RELEASE
>Environment:
FreeBSD nenuial.arnor.es 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Sat Dec 27 18:36:37 CET 1997     root@nenuial.arnor.es:/usr/src/sys/compile/NENUIAL  i386

>Description:
A mrouted tunnel through an Internet connection using user PPP with
aliasing enabled doesn't work. If I disable aliasing (alias enable
off) the tunnel starts to work.
Looking at the traffic at tun0 with tcpdump (at the machine with the
aliasing enabled) shows that the other party's IGMP probes aren't
received. Once I disable the aliasing, the messages start to arrive
and the multicast tunnel is established succesfully.
>How-To-Repeat:
Try to establish a mrouted tunnel through a "tun" interface
with aliasing enabled in the userland PPP. Using 
"alias unregistered_only yes" doesn't help

>Fix:

>Audit-Trail:
>Unformatted: