3Com DSA-3CV1100-02 service manual Ethernet Traffic Counters

Using a PC Terminal Emulator to Solve Problems 127

Using a PC Terminal Refer to Appendix C, “Terminal Emulation Settings” for setting the

Emulator to Solve parameters of a terminal emulation program. Then refer to Chapter 3,

ProblemsManaging the VCN Access Concentrator, to operate the management menus.

Ethernet Traffic The normal frame counters indicate traffic between the VCN AC and the Counters Superstack II Switch 1100. Some errored frame counters indicate errors,

relating to the VCN AC port, RJ-45 cable or the SuperStack II Switch 1100.

Table 17 presents normal count indications of the Ethernet traffic counters and probable causes for abnormal indications.

Table 17 Ethernet Traffic Counters

Counter	Counts the Frames	Normal Count	Abnormal Count
			Indicates
Tx frame	Sent via the Ethernet	Increased as traffic is	No data transmitted
	Port.	generated	Possible hardware
			failure:
			■ VCN AC port Tx
				channel
			■	User Ethernet
				cable
			■ No VCN AC port
				connection
Rx frame	Received via the	Increased as traffic is	No data received
	Ethernet port	generated	Possible hardware
			failure:
			■ VCN AC port Rx
				Channel
			■	User Ethernet
				cable
			■ No VCN AC port
				connection
Rx collision	The VCN AC port	Zero or steady. For	Collisions on the
	was unable to	non-zero count,	line: hardware
	receive due to	reset the counter	failure of VCN AC
	collisions on the line	and wait a	port
		reasonable period of
		time to check for no
		significant increase.