06-05-2003 07:56 PM - edited 02-20-2020 10:47 PM
Hi,
We have a 3-DES Tunnel between a PIX and Cisco 1721 Router. I am able to transfer packets less than\equal to 992 Bytes. As soon as i increase the packet size (using 'ping") to 993 bytes, it Fails.
However with a Tunnel between Cisco 1721 (EXACTLY same config) works fine with a VPN 3000 concentrator and i can send packets even 2000 bytes.
Issue is defintely with PIX. IS it dis-allowing fragmentation ? Howe can i fix this ?
Regards \\ Naman
06-05-2003 08:24 PM
Hi,
Whats the MTU size defined on the inteface of the PIX? Please execute the following in config t:
mtu outside 1500
mtu inside 1500
Thanks,
Mynul
06-06-2003 09:13 AM
We were using Ping to test\verify this functionality and IDS Signature 2151 was denying packets. Disabling that Signature solved the problem.
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