3Com 3500 manual Fields in the IP Multicast Dvmrp Cache Display

518CHAPTER 18: IP MULTICAST

ip multicast dvmrp cacheDisplay

✓3500

✓9000

9400

3900

9300

For CoreBuilder 9000: Applies to Layer 3 switching modules only.

Displays the DVMRP cache, which is a collection of information about the IP multicast packets that have traveled through the system.

Valid Minimum Abbreviation

ip m d c

Options

Prompt	Description	Possible Values		[Default]
Multicast	Source for which you	■	Depends on your	255.255.255.255
source address	want to view cache		network	(factory default),
	information	■	255.255.255.255	or current value
			for all sources
Multicast	Multicast group for	■	Depends on your	255.255.255.255
group address	which you want to		network	(factory default),
	view cache	■	255.255.255.255	or current value
	information
			for all groups

Fields in the IP Multicast DVMRP Cache Display

Field	Description
Source	Information about IP multicast sources:
	■ Entries preceded by angle brackets (>) are
	subnetworks that contain sources.
	■ Entries without angle brackets are the IP addresses of
	source devices.
Group	IP multicast group address of packets coming from the
	source and subnetwork to the left.
CTmr	Time since the cache entry was originally recorded. Time is
	noted in hours (h), minutes (m), and seconds (s).
Age	Value that indicates the remaining life for the cache entry.
	Time is recorded in minutes (m) and seconds (s). The
	system assigns a life of approximately 7 minutes to each
	entry. When the age if the entry decreases to zero, the
	entry either disappears or is refreshed.
PTmr	Time remaining before the system sends a prune message
	to an upstream router. Time is shown in minutes (m) and
	seconds (s). When traffic is actively flowing, a dash (-)
	indicates that no prune message has been sent upstream.