[Xorp-users] About the allmulti flag

[Arturo Borrero]

Hi there!

I'm wondering how the ALLMULTI flag is related to xorp.

Does xorp activate it automatically in my interfaces? Have I to set it 
up manually?

An example:

I have some interfaces on my box: some have the ALLMULTI flag

18: bond1.27 at bond1: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 
qdisc noqueue state UP mode DEFAULT
     link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff

And some not:

20: bond1.31 at bond1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc 
noqueue state UP mode DEFAULT
     link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff

In this case (bond1.31) I don't get multicast running, despite the exact 
same configuration than in bond1.27. The only different I can see is the 
ALLMULTI flag.
Multicast transmissions are running fine in bond1.27.

I really want to avoid doing something like "ifconfig bond1.31 ALLMULTI" 
manually.

Best regards.

-- 
Arturo Borrero González
Departamento de Seguridad Informática, @NIS_CICA (twitter)
Centro Informático Científico de Andalucía (CICA)
Avda. Reina Mercedes s/n - 41012 - Sevilla (Spain)
Tfno.: +34 955 056 600 / FAX: +34 955 056 650
Consejería de Economía, Innovación, Ciencia y Empleo
Junta de Andalucía


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