HP FlexNetwork HSR6600 Configuration Manual page 505

5. The default MTU value varies by interface type. To avoid packet fragmentation, set the MTU
value for each POS interface on each device to 1500 bytes. The following shows the MTU
configuration on PE 1.
[PE1] int pos 1/1/0
[PE1-Pos1/1/0] mtu 1500
[PE1-Pos1/1/0] shutdown
[PE1-Pos1/1/0] undo shutdown
Verifying the configuration
# Ping CE 2 from CE 1 to verify their connectivity.
<CE1> ping 100.2.1.2
Ping 100.2.1.2 (100.2.1.2): 56 data bytes, press CTRL_C to break
56 bytes from 100.2.1.2: icmp_seq=0 ttl=128 time=1.073 ms
56 bytes from 100.2.1.2: icmp_seq=1 ttl=128 time=1.428 ms
56 bytes from 100.2.1.2: icmp_seq=2 ttl=128 time=19.367 ms
56 bytes from 100.2.1.2: icmp_seq=3 ttl=128 time=1.013 ms
56 bytes from 100.2.1.2: icmp_seq=4 ttl=128 time=0.684 ms
--- Ping statistics for 100.2.1.2 ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.684/4.713/19.367/7.331 ms
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