Cabletron Systems 7F06-02 manual Indicates the state of the A/B Link LEDs

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Table 4-3 indicates the state of the A/B Link LEDs.

Table 4-3. Link LEDs

A	p	S	B	State
Green	N/A	N/A	Green	Ports Enabled & Active
Green	Green	Off	Green	THRU A, MAC on Primary,
				Secondary Bypasses Board
Green	Green	Yellow	Green	THRU A, MAC on Primary,
				No MAC on Secondary
Green	Off	Green	Green	THRU B, MAC on Secondary,
				Primary Bypasses Board
Green	Yellow	Green	Green	THRU B, MAC on Secondary,
				No MAC on Primary
Green	Yellow	Off	Green	THRU, No MAC on Primary,
				Secondary Bypasses Board
Green	Off	Yellow	Green	THRU, No MAC on
				Secondary, Primary Bypasses
				Board
Green	Green	Red	Yellow	WRAP A, MAC on Primary
Green	Yellow	Red	Yellow	WRAP A, No MAC on
				Primary
Yellow	Green	Red	Green	WRAP B, MAC on Primary
Yellow	Yellow	Red	Green	WRAP B, No MAC on Primary
Green	Green	Red	Green	WRAP AB, MAC on Primary
Green	Off	Off	Green	BYPASS Primary & Secondary
Green	Red	Red	Green	TWISTED A-A, B-B
Yellow	Off	Off	Yellow	PCM did not complete, Not
				Active
Red	Off	Off	Red	Ports Disabled

4-3