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Hi,all
I have a problem when use LVS:
director use Tunnel Mode
a UDP server running on the realserver
when client send UDP requests to lvs, it can not receive the realserver's
response.
I capture packets on the director using ethereal, the packet shows that:
director receives the requests , but dose not transmit then to
realserver
the requests size is 1464(not include the UDP and IP header)
the IP header set the DON'T FRAGMENT to 1
i guess the reason is like that:
requests size is 1464 and plus UDP and IP header will become 1492.
when director add a IP header on it,its size will be 1512, which exceeds the
MTU(1500). Because the IP header set the DON'T FRAGMENT to 1, director only
have to drop the packets.
Can anynoe tell me why ?
Why the the IP header's DON'T FRAGMENT flag is 1?
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