selftests/net/pmtu.sh

11 #	R1 and R2 (also implemented with namespaces), with different MTUs:
16 #	'--------------R2--------------'	b_r2: 1500
73 #	R1. R2 is unused in these tests. A has a veth connection to C, and is
92 #	and B over R1. A and R2 are unused in these tests. The init namespace
273 # identifier ID, which is 1 for hosts (A and B), 2 for routers (R1 and R2).
286 	A	R2	${a_r2}
288 	B	R2	${b_r2}
290 # Traffic from A to B goes through R1 by default, and through R2, if destined to
307 	A	4	42	${prefix4}.${a_r2}.2	veth_A-R2
311 	A	6	62	${prefix6}:${a_r2}::2	veth_A-R2
822 	tc -netns "${NS_A}" qdisc replace dev veth_A-R2 root prio
826 	tc -netns "${NS_A}" filter add dev veth_A-R2                      \
1023 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
1024 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
1042 	mtu "${ns_a}"  veth_A-R2 2000
1045 	mtu "${ns_b}"  veth_B-R2 1500
1078 	# Decrease remote MTU on path via R2, get new exception
1080 	mtu "${ns_b}"  veth_B-R2 400
1086 	mtu "${ns_a}"  veth_A-R2 500
1092 	mtu "${ns_a}"  veth_A-R2 1500
1117 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
1118 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
1126 	mtu "${ns_a}"  veth_A-R2 2000
1129 	mtu "${ns_b}"  veth_B-R2 1500
1162 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
1163 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
1171 	mtu "${ns_a}"  veth_A-R2 2000
1174 	mtu "${ns_b}"  veth_B-R2 1500
2080 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
2081 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
2092 	mtu "${ns_a}"  veth_A-R2 2000
2095 	mtu "${ns_b}"  veth_B-R2 1500
2104 	# Create 100 cached route exceptions for path via R1, one via R2. Note
2134 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
2135 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
2146 	mtu "${ns_a}"  veth_A-R2 2000
2149 	mtu "${ns_b}"  veth_B-R2 1500
2158 	# Create 100 cached route exceptions for path via R1, one via R2
2186 	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \
2187 	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2
2207 	mtu "${ns_a}"  veth_A-R2 2000
2210 	mtu "${ns_b}"  veth_B-R2 1500