Cabletron Systems SmartSwitch 9W006 User Manual page 108

USER'S GUIDE
compression protocol. The key feature of this sequence is that each side receives a
CONFIG-ACK to its respective CONFIG-REQ.
(I) 15:35:09.98 #80FD: Conn=001 OUT-PPP:CCP
(I) 15:35:09.98 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 15:35:09.98 #9999:
(I) 15:35:09.98 #80FD: Conn=001 IN -PPP:CCP
(I) 15:35:09.98 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 15:35:09.98 #9999:
(I) 15:35:09.99 #80FD: Conn=001 OUT-PPP:CCP
(I) 15:35:09.99 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 15:35:09.99 #9999:
(I) 15:35:09.99 #80FD: Conn=001 IN -PPP:CCP
(I) 15:35:09.99 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 15:35:09.99 #9999:
• Peer Protocol-Rejects CCP
If the peer does not actually support PPP compression, it will most likely Protocol-Reject
the SmartSwitch Remote Access Module's attempt to negotiate CCP. In this case, the
SmartSwitch Remote Access Module will abandon its attempt to use compression and the
connection will operate uncompressed. The incoming frame from the peer contains a
PROT-REJ, whose 1st two hex octets in the trace indicate the CCP protocol (0x80FD).
(I) 16:01:51.65 #80FD: Conn=001 OUT-PPP:CCP
(I) 16:01:51.65 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 16:01:51.65 #9999:
(I) 16:01:51.65 #C021: Conn=001 IN -PPP:LCP
(I) 16:01:51.71 #0000:
• The SmartSwitch Remote Access Module does not have Compression ENABLED
In this case, the SmartSwitch Remote Access Module will respond to all attempts by the
peer to open CCP with a TERM-ACK frame. The connection will operate uncompressed.
(Note: a device that supports compression but has it disabled will typically do the exact
same thing).
(I) 15:36:40.54 #80FD: Conn=001 IN -PPP:CCP
(I) 15:36:40.54 #9999: -Alg: 0x11 (STAC-LZS) Len: 5
(I) 15:36:40.54 #9999:
(I) 15:36:40.54 #80FD: Conn=001 OUT-PPP:CCP
108 SmartSwitch Remote Access Module
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
80 FD 01 87 00 09 11 05 00 01 03
Hist Count: 01 Chk Mode: 0x03 (SEQ#)
CFG REQ Id=0xB4 Len=9
CFG REQ Id=0x7B Len=9
CFG ACK Id=0x7B Len=9
CFG ACK Id=0xB4 Len=9
CFG REQ Id=0x87 Len=9
PROT REJ Id=0x00 Len=15
CFG REQ Id=0xEC Len=9
TERM ACK Id=0xEC Len=4