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Cisco Bug: CSCun02007 - IPEP slow data transfer rate and packet loss with traffic bursts

Last Modified

Jun 08, 2016

Products (1)

  • Cisco Identity Services Engine

Known Affected Releases


Description (partial)

IPEP slow data transfer rate and packet loss with traffic bursts.

For example:
With SMB traffic,FTP traffic we have very poor file transfer rates of 10kbps.We see lots of TCP retransmissions and DUP ACK frames on both eth0/eth1 interfaces.
The IPEP/IPN node suffers from packet loss if fileserver sends a burst of 5 packets before an ACK is sent back.

IPEP routed mode.
 While switching packets between eth0 and eth1, we seem to be losing some packets which then get either retransmitted or Fast-retransmitted following  3 Duplicate ACK's from the client that is using  TCP Selective ACK to tell the server which sequences it did not receive.
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