On 2012-08-30, Scott <8f27e...@gmail.com> wrote: > vis-a-vis /etc/hostname.if, where the 'if' is em1 and is a real > interface that is aggregating several VLANs (as em1 is connected to a > Cisco L2 switch). Since the each of the VLAN interface has its own, > and topology relevant, IPV4 address, we don't want or need em1 itself > to have an IP. Our /etc/hostname.em1 is as follows, > > ---- START ---- > -inet mtu 1518 -inet6 group inside > up > ---- END -----
the default is to have no IPv4 address, no need to do anything there, so just try -inet6 mtu 1518 group inside up (but note, you don't need to set mtu manually if this is just standard 802.1q vlans, only if you're doing something special like svlan(4) q-in-q tag stacking). when I have an interface just hosting vlans I usually just have 'up' in hostname.if, no IPv4 address is assigned. -inet is invalid syntax. > 'em1' is CORRECTLY absent an IPV6 address (NOINET6); however, it > always -- and UNDESIRABLY -- comes up with an IPV4 address in the > 8.n.n.n/8 range. (Side note: No idea why it gets an IPV4 8/8 as that > isn't in our topology anywhere and it becomes problematic at times to > the routing table.) if you want to track down why this happens, you might like to add 'echo running: "$cmd"' before the 'eval "$cmd"' line in /etc/netstart and look at the output.
