Date: Thu, 16 Feb 2006 19:03:56 GMT From: Andrew Webster <awebster@connectalk.com> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/93448: CARP advskew not propagated to VRRP packets Message-ID: <200602161903.k1GJ3uaQ092723@www.freebsd.org> Resent-Message-ID: <200602161910.k1GJA4BX058789@freefall.freebsd.org>
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>Number: 93448
>Category: i386
>Synopsis: CARP advskew not propagated to VRRP packets
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Feb 16 19:10:03 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Andrew Webster
>Release: 5.4p8
>Organization:
ConnecTalk Inc.
>Environment:
FreeBSD carp1.connectalk.com 5.4-RELEASE-p8 FreeBSD 5.4-RELEASE-p8 #0: Tue Dec 20 11:39:40 EST 2005 root@serialtest.connectalk.com:/usr/src/sys/i386/compile/CARP i386
>Description:
Carp advskew values of < 240 are ignored and set to 240.
Carp interface configured as follows:
# ifconfig em1
em1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet6 fe80::20c:29ff:fef1:9f4c%em1 prefixlen 64 scopeid 0x2
inet 10.10.1.2 netmask 0xffffff00 broadcast 10.10.1.255
ether 00:0c:29:f1:9f:4c
media: Ethernet autoselect (1000baseTX <full-duplex>)
status: active
# ifconfig carp0
carp0: flags=41<UP,RUNNING> mtu 1500
inet 10.10.1.1 netmask 0xffffff00
carp: MASTER vhid 10 advbase 1 advskew 1
# tcpdump -n -i em1
13:58:14.738030 IP 10.10.1.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 10, prio 240, authtype none, intvl 1s, length 36
13:58:16.687548 IP 10.10.1.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 10, prio 240, authtype none, intvl 1s, length 36
Notice prio is 240, not 1. If set to > 240, then it follows.
# ifconfig carp0 advskew 242
# tcpdump -n -i em1
13:59:07.529908 IP 10.10.1.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 10, prio 242, authtype none, intvl 1s, length 36
13:59:09.488462 IP 10.10.1.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 10, prio 242, authtype none, intvl 1s, length 36
Now it is 242.
>How-To-Repeat:
# ifconfig em1 10.10.1.2/24
# ifconfig carp0 create
# ifconfig carp0 vhid 10 advbase 1 advskew 1
# ifconfig carp0 10.10.1.1/24
# ifconfig carp0 up
# tcpdump -n -i em1
>Fix:
Looks like carp_suppress_preempt is being incorrectly set to true.
Perhaps in static void carp_sc_state_locked(struct carp_softc *sc)
Actual fix ?
>Release-Note:
>Audit-Trail:
>Unformatted:
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