Juniper Openstack

Handle ARP packet with NULL src ip as Gratuitous ARP

Bug #1513793 reported by Divakar Dharanalakota
18
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Juniper Openstack
Status tracked in Trunk
R2.20
Fix Committed
Medium
Divakar Dharanalakota
Juniper Openstack r2.22
R2.21.x
Fix Committed
Medium
Divakar Dharanalakota
Juniper Openstack r2.21.1
Trunk
Fix Committed
Medium
Divakar Dharanalakota
Juniper Openstack r3.0-fcs

Bug Description

As per RFC 5227 following needs to be satisfied

 An ARP request/response packet with zero source IP address need to be treated as Gratuitous ARP packet. This is called ARP Probe and DHCP clients/servers typically use this to identify duplicate IPV4 address allocation.

2) A gratuitous ARP can also be ARP reply.

Tags: vrouter
Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : [Review update] R2.20

Review in progress for https://review.opencontrail.org/14955
Submitter: Hari Prasad Killi (<email address hidden>)

Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : [Review update] R2.21.x

Review in progress for https://review.opencontrail.org/14956
Submitter: Hari Prasad Killi (<email address hidden>)

Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : A change has been merged

Reviewed: https://review.opencontrail.org/14955
Committed: http://github.org/Juniper/contrail-vrouter/commit/36ceb42cdc4e9020660de3fc3c475690c5849496
Submitter: Zuul
Branch: R2.20

commit 36ceb42cdc4e9020660de3fc3c475690c5849496
Author: Hari <email address hidden>
Date: Sat Nov 7 07:57:45 2015 +0530

Treat ARP pkt with zero source IP as Gratuitous ARP

As per RFC 5227, when ARP packet is received with zero source IP, this
needs to be treated as ARP PRobe. In Vrouter case, it should not be
treatd as regular ARP request and flooded to complete VN, so that VM/BMS
treats this like ARP probe and take appropriate action. Vrouter treating
this as ARP request results in senidng ARP response with stiched/Proxied
MAC.

Committing on behalf of Divakar.

Change-Id: Ia89e0d99b7b8895243e5707c8f67dc78265db8a9
closes-bug: #1513793

Revision history for this message
OpenContrail Admin (ci-admin-f) wrote :

Reviewed: https://review.opencontrail.org/14956
Committed: http://github.org/Juniper/contrail-vrouter/commit/5c6390a7ecba78ea91dfbf3c1d6ab394c51aa281
Submitter: Zuul
Branch: R2.21.x

commit 5c6390a7ecba78ea91dfbf3c1d6ab394c51aa281
Author: Hari <email address hidden>
Date: Sat Nov 7 08:01:29 2015 +0530

Treat ARP pkt with zero source IP as Gratuitous ARP

As per RFC 5227, when ARP packet is received with zero source IP, this
needs to be treated as ARP PRobe. In Vrouter case, it should not be
treatd as regular ARP request and flooded to complete VN, so that VM/BMS
treats this like ARP probe and take appropriate action. Vrouter treating
this as ARP request results in senidng ARP response with stiched/Proxied
MAC.

Committing on Divakar's behalf.

Change-Id: I7d9943054882c8167fb29b2e5c93089591962d41
closes-bug: #1513793

Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : [Review update] master

Review in progress for https://review.opencontrail.org/14975
Submitter: Hari Prasad Killi (<email address hidden>)

Nagabhushana R (bhushana)
information type: Proprietary → Public
Revision history for this message
OpenContrail Admin (ci-admin-f) wrote : A change has been merged

Reviewed: https://review.opencontrail.org/14975
Committed: http://github.org/Juniper/contrail-vrouter/commit/b9be67ef2e44c551d88a0ef5e875d4bbf165579b
Submitter: Zuul
Branch: master

commit b9be67ef2e44c551d88a0ef5e875d4bbf165579b
Author: Hari <email address hidden>
Date: Mon Nov 9 14:18:50 2015 +0530

Treat ARP pkt with zero source IP as Gratuitous ARP

As per RFC 5227, when ARP packet is received with zero source IP, this
needs to be treated as ARP PRobe. In Vrouter case, it should not be
treatd as regular ARP request and flooded to complete VN, so that VM/BMS
treats this like ARP probe and take appropriate action. Vrouter treating
this as ARP request results in senidng ARP response with stiched/Proxied
MAC.

Committing on Divakar's behalf.

Change-Id: Ib70e7c81ce6dcd2d5126fc43316ef9e0b6ef2592
closes-bug: #1513793

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