Date: Tue, 24 Aug 2010 01:55:19 +0200 (CEST) From: Ingo Flaschberger <if@xip.at> To: net@freebsd.org Subject: Re: funny ECMP Message-ID: <alpine.LFD.2.00.1008240144350.12708@filebunker.xip.at> In-Reply-To: <alpine.LFD.2.00.1008230154280.29368@filebunker.xip.at> References: <alpine.LFD.2.00.1008230154280.29368@filebunker.xip.at>
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--168430090-1063431390-1282607720=:12708
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
Hi,
I have changed the route selection code of ecmp to
balance only between routes of the same weight.
(see attached file)
As Qing Li mentioned months ago, there are problems with static routes and
interfaces.
Example 1:
ifconfig em1 alias 10.13.13.90/24
ping 10.13.13.95 ok
route add 10.13.13.0/24 10.11.11.1 -weight 2
ping 10.13.13.95 broken (arpresolve: can't allocate llinfo for
10.13.13.95)
Eaxmple 2:
route add 10.13.13.0/24 10.11.11.1 -weight 2
ping 10.13.13.95 ok
route add 10.13.13.0/24 10.11.11.2 -weight 3
ping 10.13.13.95 ok
ifconfig em1 alias 10.13.13.90/24
ping 10.13.13.95 broken (arpresolve: can't allocate llinfo for
10.13.13.95)
route delete 10.13.13.0/24 10.11.11.2
ping 10.13.13.95 broken
route delete 10.13.13.0/24 10.11.11.1
ping -> system crash
deleting the last static multipath routes seems to affect?, destroy?
the interface route.
system crashes in:
/usr/src/sys/net/route.c:370
rn = rnh->rnh_matchaddr(dst, rnh);
if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) {
newrt = rt = RNTORT(rn);
here -> RT_LOCK(newrt);
RT_ADDREF(newrt);
if (needlock)
Kind regards,
Ingo Flaschberger
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