3Com 7600 manual Virtual LANs

Virtual LANs Overview 12-17

Table 12-6LEC Operational Parameters (continued)

Parameter	Description	Minimum	Default	Maximum
VCC-timeout	An LEC should release any Data-direct VCC	None specified	20 minutes	Unlimited
	that has not been used to transmit or receive
	any data frames for the length of the VCC
	timeout period. This parameter is only
	meaningful for SVC Data-direct VCCs.
Aging-time	The maximum time that an LEC will maintain	10 seconds	300 seconds	Unlimited
	an entry in its LE_ARP cache in the absence of
	a verification of that relationship
Forward-delay-	The maximum time that an LEC will maintain	4 seconds	15 seconds	30 seconds
time	an entry for a non-local MAC address in its
	LE_ARP cache in the absence of a verification
	of that relationship, as long as the Topology
	Change flag is true.
Expected LE_ARP	The maximum time that the LEC expects an	1 second	1 second	30 seconds
Response-time	LE_ARP request/response cycle to take. Used
	for retries and verifies.
Topology-	Boolean indication that the LEC is using the	N/A	N/A	N/A
change-flag	Forward delay time instead of Aging time to
	age non-local entries in its LE_ARP cache.
Flush-timeout	Time limit to wait to receive a LE_FLUSH	1 second	4 seconds	4 seconds
	response after the request has been sent,
	before taking recovery action.
Path-switching-	The time since sending a frame to the BUS	1 second	6 seconds	8 seconds
delay	after which the LEC may assume that the
	frame has been either discarded or delivered
	to the recipient. May be used to bypass the
	Flush protocol.
Connection-	In Connection Establishment this is the time	1 second	4 seconds	10 seconds
completion-	period in which data or a READY_IND
timer	message is expected from a Calling Party.
Maximum-	Maximum number of unknown frames sent	1 frame	1 frame	10 frames
unknown-frame- to BUS during the time period
count	Maximum-unknown-frame-time.
Maximum-	Within the period of time defined by the	1 second	1 second	60 seconds
unknown-frame- Maximum-unknown-frame-time, a LEC will
time	send no more than
	Maximum-unknown-frame-count frames to
	the BUS for a given unicast LAN destination.

Virtual LANs	Virtual LANs (vLANs) represent location-independent logical user groups.
Overview	LAN Emulation allows you to create enterprise-wide vLANs that closely
	correspond to how your network and business actually function. The