Multicast Routing Definition of Terms
- CIDR Addr
- This is the actual route being passed around in the DVMRP routing
table. It is expressed in the CIDR form of address/bits, where "bits"
is the number of 1-bits in the netmask (e.g. 25 means the netmask is
255.255.255.128). Note = is used to designate an exact match.
An address of =131.179/16 will only match the route 131.179/16, while
an address of 131.179/16 will match 131.179/16, 131.179.48/24, etc.
- AS Number
- This is the AS that advertises this route into the unicast (BGP)
routing table. If it is a provider's AS, it is the site's unicast
provider, but may not be the provider of multicast service.
- State
- "up" means the route is currently being advertised in the DVMRP
routing table, "down" means it is not.
- Change
- This is the date and time that the last change in
state was reported.
- Metric
- This is the metric reported for this route at the end of the last
hour. A metric of 32 indicates the route is unreachable. A metric
greater than 32 means the route is being advertised as poison reverse
route.
- Updates
- The number of updates received for this route during the last hour.
A route update should be sent once per minute unless route changes
cause additional updates to be triggered.
- F
laps
- This is the average number of flaps per hour this route has seen in
the time period requested (current hour, current week, or current month).
- U
ptime
- This is the percentage of hours during the time period in which the
route has been up.
- C
hanges
- This is the number of times this route has changed
state during the time period requested.