Subject: Re: better ARP handling in IPv4 alias address
To: Andrew Brown <firstname.lastname@example.org>
From: Jun-ichiro itojun Hagino <email@example.com>
Date: 07/04/2001 09:23:12
>> there are a couple of issues remain, however (i should have appended
>> it to the PR):
>> - for off-link destinations, the primary (1st) address will be used as
>> the source address on packets. we can still trick it by changing
>> rt->rt_ifa though.
>> - if the primary (1st) address gets removed, subnet route (like 10/8
>> for 10.0.0.1/8) goes away. to fix this we need to change rt_ifinit()
>for this to work really well, i feel that there should be a way to
>*insert* an address at the head of the list of addresses for a given
>i've had "problems" where the "primary" ipv4 address was removed via
>"-alias" and then a new address was added via "alias".
>"alias" adds to the end of list, "-alias" removes arbitrarily from the
>list, "delete" removes the head of the list, and the absence of the
>alias keyword *sets* the head of the list (at the same time deleting
>what was there). the "insert at the head of the list" bit is missing.
you can use the following:
# ifconfig wi0 <secondary address> -alias
for IPv6, we forbid the following form as IPv4 behavior assumed that
the primary (1st one) gets removed, and it is a bad assumption to make.
# ifconfig wi0 -alias