0004-arp-flush-arp-cache-on-device-change.patch 799 Bytes
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From 8a0e3ea4924059a7268446177d6869e3399adbb2 Mon Sep 17 00:00:00 2001
From: Timo Teras <timo.teras@iki.fi>
Date: Mon, 12 Apr 2010 13:46:45 +0000
Subject: [PATCH 04/18] arp: flush arp cache on device change

If IFF_NOARP is changed, we must flush the arp cache.

Signed-off-by: Timo Teras <timo.teras@iki.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 4e80f33..580bfc3 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1200,6 +1200,9 @@ 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;
 	}
-- 
1.7.0.2