Cisco Cisco IOS Software Releases 12.2 MC

For complete details of the ACFC and PFC Handling During PPP Negotiation feature, see the ACFC and 
PFC Handling During PPP Negotiation feature module:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122b/122b_15/1
2b_acf.htm#1025043

To minimize traffic flow corruption, cUDP flows now expire after an expiration timeout duration during 
which no packets are passed. When this duration of inactivity occurs on a flow at the compressor, the 
compressor sends a full header upon receiving a packet for that flow, or, if no new packet are received 
for that flow, makes the CID for the flow available for new use. When a packet is received at the 
decompressor after the duration of inactivity, the packet is dropped and a context state message is sent 
to the compressor requesting a flow refresh.

The default expiration timeout is 5 seconds. The recommended value is 8 seconds.

Failure of performance/latency scripts could occur if the expiration timeout duration is not changed to 
the recommended 8 seconds.

To configure the cUDP flow expiration timeout duration, issue the following command while in 
multilink interface configuration mode:

To restore the default, use the no form of this command. 

This new feature is identified by CSCeb44623.

The Cisco MWR 1941-DC router does not support online insertion and removal (OIR) of WAN interface 
cards. Any attempt to perform OIR on a card in a powered up router might cause damage to the card.

Removing the compact flash from the Cisco MWR 1941-DC router during a read/write operation might 
corrupt the contents of the compact flash, rendering it useless. To recover from an accidental removal of 
or corruption to the compact flash, a maintenance spare with the appropriate bootable Cisco IOS 
software image might be needed.

Router(config-if)# ppp iphc max-time seconds

Specifies the duration of inactivity, in seconds, that when 
exceeded causes the cUDP flow to expire. The recommended 
value is 8.