>Number:         5400
>Category:       bin
>Synopsis:       Bug bin/2365 is alive again (netstat -g woes)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people (Utility Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun May  3 23:50:00 1998
>Last-Modified:
>Originator:     Heiko W.Rupp
>Organization:
private
>Release:        NetBSD-1.3.1
>Environment:
System: NetBSD snert 1.3.1 NetBSD 1.3.1 (SNERT) #1: Thu Apr 30 19:50:31 MEST 1998 hwr@snert:/usr/src/sys/arch/i386/compile/SNERT i386


>Description:
	netstat -g displays crap when no mrouted is running and therefore 
    no multicast vifs are in the kernel:

snert# netstat -g |head
netstat: kvm_read: Bad address
[snip]
netstat: kvm_read: Bad address

Virtual Interface Table is empty

Multicast Forwarding Cache
 Hash  Origin           Mcastgroup       Traffic  In-Vif
Out-Vifs/Forw-ttl
    0  0.0.0.0          0.0.0.0               0        0 
    1  0.0.0.0          0.0.0.0               0        0 


or

snert# !!
netstat -g | head
netstat: kvm_read: Bad address
[snip]
Virtual Interface Table is empty

Multicast Forwarding Cache
 Hash  Origin           Mcastgroup       Traffic  In-Vif
Out-Vifs/Forw-ttl
    0  0.0.0.0          0.0.0.0               0        0 
    1  0.0.0.0          0.0.0.0               0        0 
    2  0.232.124.240    239.190.173.222    1856m     48879  0/173

>How-To-Repeat:

Run netstat -g when MROUTING defined in the kernel, but no mrouted is
running. I guess at least one physical interface with MULTICAST
enabled must be present in the system as in

snert# ifconfig -a
we0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ppp0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500

	
>Fix:
	
>Audit-Trail:
>Unformatted: