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Date:	Wed,  3 Mar 2010 16:01:14 +0200
From:	Timo Teras <timo.teras@....fi>
To:	netdev@...r.kernel.org
Cc:	Timo Teras <timo.teras@....fi>
Subject: [PATCH 2/2] ipv4: flush ARP entries on device change

If device flag IFF_NOARP is changed, we should flush the ARP cache as all
entries need to get refreshed.

Signed-off-by: Timo Teras <timo.teras@....fi>
---
 net/ipv4/arp.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index c4dd135..036da92 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1245,6 +1245,9 @@ static int arp_netdev_event(struct notifier_block *this, unsigned long event, vo
 		neigh_changeaddr(&arp_tbl, dev);
 		rt_cache_flush(dev_net(dev), 0);
 		break;
+	case NETDEV_CHANGE:
+		neigh_changeaddr(&arp_tbl, dev);
+		break;
 	default:
 		break;
 	}
-- 
1.6.3.3

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