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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9097) Extra public ip addresses do not work immediately
Date Fri, 04 Dec 2015 10:06:11 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15041372#comment-15041372
] 

ASF subversion and git services commented on CLOUDSTACK-9097:
-------------------------------------------------------------

Commit 90e01c95a2db3d9b7c6586b2b228e0a9c5b9e415 in cloudstack's branch refs/heads/master from
[~remibergsma]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=90e01c9 ]

CLOUDSTACK-9097 Make public ip work immediately

We need to send an Unsolicited ARP to the gateway, instead of our own address. We now encounter
problems when people deploy/destroy/deploy and get the same public ip.


> Extra public ip addresses do not work immediately
> -------------------------------------------------
>
>                 Key: CLOUDSTACK-9097
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9097
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: SystemVM
>    Affects Versions: 4.6.0, 4.6.1
>            Reporter: Remi Bergsma
>            Assignee: Remi Bergsma
>            Priority: Critical
>
> Sometimes public ip addresses do not work immediately, this is in case they are used
as a secondary ip on an interface.
> Service on secondary ip which is recently used by other routervm and therefore cached
on the gateway:
> root@r-547-VM:~# tcpdump -e -i eth1 icmp
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
> 13:23:27.709762 5c:5e:ab:29:bf:ca (oui Unknown) > 06:0e:ee:00:00:24 (oui Unknown),
ethertype IPv4 (0x0800), length 98: 52D9557D.cm-11-1b.dynamic.ziggo.nl > x.y.237.226: ICMP
echo request, id 10107, seq 1127, length 64
> 13:23:28.701694 5c:5e:ab:29:bf:ca (oui Unknown) > 06:0e:ee:00:00:24 (oui Unknown),
ethertype IPv4 (0x0800), length 98: 52D9557D.cm-11-1b.dynamic.ziggo.nl > x.y.237.226: ICMP
echo request, id 10107, seq 1128, length 64
> ^C
> Packets arrive, but with incorrect / cached mac and are ignored by the routervm kernel.
> Run arping to update the arp-cache on the gateway and things start to work:
> root@r-547-VM:~# arping -S x.y.237.226 x.y.237.129
> ARPING x.y.237.129
> 60 bytes from 00:00:5e:00:01:a0 (x.y.237.129): index=0 time=1.372 msec
> 60 bytes from 00:00:5e:00:01:a0 (x.y.237.129): index=1 time=893.665 usec
> ^C
> --- x.y.237.129 statistics ---
> 2 packets transmitted, 2 packets received,   0% unanswered (0 extra)
> root@r-547-VM:~# tcpdump -e -i eth1 icmp
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
> 13:23:51.922328 5c:5e:ab:29:bf:ca (oui Unknown) > 06:47:88:00:00:24 (oui Unknown),
ethertype IPv4 (0x0800), length 98: 52D9557D.cm-11-1b.dynamic.ziggo.nl > x.yy.237.226:
ICMP echo request, id 8422, seq 9, length 64
> 13:23:51.922368 06:47:88:00:00:24 (oui Unknown) > 00:00:5e:00:01:a0 (oui Unknown),
ethertype IPv4 (0x0800), length 98: x.y.237.226 > 52D9557D.cm-11-1b.dynamic.ziggo.nl: ICMP
echo reply, id 8422, seq 9, length 64
> Suggested solution: update routervm scripting to run arping when adding a secondary ip.
> Ping [~wilder.rodrigues]



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