[LTP] [PATCH] ipneigh01.sh: Fix an issue where ipneigh01_arp test case fail due to ARP timeout

[Xu Senmiao]

When the ARP status of the rhost is stale,
lhost ping rhost and the lhost deletes the ARP record,
the record in the rhost changes from stale to delay.
Then, the probe request is sent to the lhost, and the lhost ARP information is updated.

   rhost(10.0.0.1)      lhost(10.0.0.2)
t1 10.0.0.2 STALE       ping 10.0.0.1
                        10.0.0.1 REACHABLE
                        arp -d 10.0.0.1
t2 10.0.0.2 DELAY
t3 probe 10.0.0.2
t4                      10.0.0.1 REACHABLE

Clear the ARP entries of rhost before each round of test.

Signed-off-by: Xu Senmiao <xusenmiao@huawei.com>
---
 testcases/network/tcp_cmds/ipneigh/ipneigh01.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/testcases/network/tcp_cmds/ipneigh/ipneigh01.sh b/testcases/network/tcp_cmds/ipneigh/ipneigh01.sh
index e67ff5cc8..4db675f8f 100755
--- a/testcases/network/tcp_cmds/ipneigh/ipneigh01.sh
+++ b/testcases/network/tcp_cmds/ipneigh/ipneigh01.sh
@@ -56,6 +56,7 @@ do_test()
 	tst_res TINFO "stress auto-creation $entry_name cache entry deleted with '$CMD' $NUMLOOPS times"
 
 	for i in $(seq 1 $NUMLOOPS); do
+		tst_rhost_run -c "arp -d $(tst_ipaddr lhost)"
 
 		ping$TST_IPV6 -q -c1 $(tst_ipaddr rhost) -I $(tst_iface) > /dev/null || \
 			tst_brk TFAIL "cannot ping $(tst_ipaddr rhost)"
-- 
2.33.0