Hi.
We have a OTV environment ASR 1000 where my Host/laptop NIC has to set to MTU 1458-bytes then only it will work, i.e
1. PING with more 1500-bytes (the maximum size is 1472)
2. Transfer large file size (1Gb file is within 20sec)
We have set the MTU with 9216 in the joint interface config and can ping to the OTV neighbor with size 9216 successfully even with df-bit set.
OTV2#ping 10.188.210.66 source ten0/0/0 size 9216
Type escape sequence to abort.
Sending 5, 9216-byte ICMP Echos to 10.188.210.66, timeout is 2 seconds:
Packet sent with a source address of 10.188.210.50
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 2/2/2 ms
OTV2#ping 10.188.210.66 source ten0/0/0 size 9216 df
Type escape sequence to abort.
Sending 5, 9216-byte ICMP Echos to 10.188.210.66, timeout is 2 seconds:
Packet sent with a source address of 10.188.210.50
Packet sent with the DF bit set
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 2/2/3 ms
If I set the MTU higher than 1458-bytes, I cannot ping with 1500-bytes and the transfer file would be very slow (1Gb more than 2hours at 15Kbps). I found out the global configuration "otv fragmentation joint-interface <interface-name>" and curious what is this command for. Base on the implementation for this command, it requires to do the global configuration first then only configure the joint interface is that true? Thanks for any support.
