518
C
HAPTER
18: IP M
ULTICAST
ip multicast dvmrp
✓
3500
✓
9000
9400
3900
9300
cacheDisplay
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
Fields in the IP Multicast DVMRP Cache Display
Prompt Description Possible Values [Default]
Multicast
source address
Source for which you
want to view cache
information
■
Depends on your
network
■
255.255.255.255
for all sources
255.255.255.255
(factory default),
or current value
Multicast
group address
Multicast group for
which you want to
view cache
information
■
Depends on your
network
■
255.255.255.255
for all groups
255.255.255.255
(factory default),
or current value
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.
