IBM SC30-3681-08 manual Brg, Stp, Nbcp

Monitoring PPP Interfaces (Talk 5)

compressed bytes, so values greater than 1 are preferable for both input and output. The higher the number, the more effective the compression.

The output ratio is computed as the ratio of the number of original plain-text bytes divided by the number of bytes sent as a result of attempting compression - whether the packet actually was compressed or sent as a CDP packet. If a data stream does not compress well and most of the packets are sent in their original form or in enlarged CDP packets, the compression output ratio will drop. If the ratio drops below 1.0, the compressor is actually reducing the effective bandwidth of the line rather than increasing it, and should be disabled on that interface if the state persists for a long time.

The input ratio is computed based on the number of bytes received in CDP frames divided into the number of decompressed bytes. Unlike the output ratio, this count does not include any packets that were incompressible and sent in plain-text form. This is because the router cannot determine if a received non-CDP packet was an incompressible packet that the peer sent in plain-text form, or just a packet that the peer did not attempt to compress.

Because of the method of calculation, the output ratio on one end of the link does not necessarily match the input ratio at the other end.

compression

This command displays the same information as list cdp.

bcp Lists statistics for the Bridging control protocol. These ®elds are the same as those described under the list ip command. (See ªipº on page 503.)

Example:

list bcp
BCP Statistic	In	Out
--------------	--	---
Packets:	0	0
Octets:	0	0
Prot Rejects:	0	-

brg	Lists statistics on the bridge packets received and transmitted over the PPP
	interface. These ®elds are the same as those described under thelist ip
	command. (See ªipº on page 503.)
	Example:
	list brg
	BRG Statistic	In	Out
	--------------	--	---
	Packets:	0	0
	Octets:	0	0
	Prot Rejects:	0	-
stp	Lists statistics for the spanning tree protocol. These ®elds are the same as
	those described under the list ip command. (See ªipº on page 503.)
	Example:
	list stp
	Spanning Tree Statistic	In	Out
	-----------------------	--	---
	Packets:	0	0
	Octets:	0	0
nbcp	Lists NetBIOS Control Protocol statistics for the point-to-point interface.
	These ®elds are the same as those described under thelist ip command.
	(See ªipº on page 503.)

502MRS V3.2 Software User's Guide