There are lots of reasons you may be seeing the performance slowdown. First of all have you verifies that you are not having any cpu or memory problems when compression is enabled?
Do you have any QoS configured? Compressed packets must arrive in order. Anything that changes the order that the packets are received in, like priority queuing or retransmits due to poor comm lines will have problems with header compressions.
how are your links and the compression configured?
are you using cisco or ietf encapsulation? is the compression configured at the interface or as a map?
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...