Monitoring DVMRP

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JUNOSe 9.1.x Multicast Routing Configuration Guide > Configuring DVMRP > Monitoring DVMRP
Monitoring DVMRP

You can establish a reference point for DVMRP statistics by setting the statistics counters to zero.

You can display DVMRP information with the show ip dvmrp commands.

baseline ip dvmrp
Use to set the counters for DVMRP statistics to zero, which establishes a reference point, or baseline, for DVMRP statistics.

Example
(host1)#baseline ip dvmrp 
There is no no version.
show ip dvmrp

Use to display DVMRP information for a VR.

Field descriptions

Dvmrp Administrative State—State of DVMRP in the software: Enabled or Disabled

Mcast Administrative State—State of multicasting in the software: Enabled or Disabled

Dvmrp Version—Version of DVMRP with which this software is compatible

GenerationID—A number the router generates each time it reboots; when the number changes, neighbors discard all information previously learned from the router

Number of Routes—Number of routes in the DVMRP routing table

Number of Triggered Routes—Number of routes waiting to be advertised, because a parameter for the route changed

Reachable Routes—Number of routes that the router can currently reach

Route-hog-notification—Number of DVMRP routes that the router can record before it generates a system log warning message

Route-limit—Maximum number of routes that the router can advertise on each interface

Send-S32-Prunes-Only—Indicator of whether the router sends only S-32 prunes

true—Router sends only S-32 prunes and grafts to ensure compatibility with other protocols, such as PIM

false—Router sends S-32 and S/Prefix grafts and prunes
Example
host1:boston>show ip dvmrp
Routing Process DVMRP - Distance Vector Multicast Routing Protocol
  Dvmrp Administrative State:         Enabled
  Multicast Administrative State:     Enabled
  Dvmrp Version:                      3.255
  Generation ID:                      0x46828e2b
  Number of Routes:                   2
  Number of Triggered Routes:         0
  Reachable Routes:                   2
  route-hog-notification:             10000
  route-limit:                        7000
  Send-S32-Prunes-Only:               true
  unicastRoutingOnly:                 false
  Graceful Restart Duration:          60
  Graceful Restart is:                complete (timer 0 seconds)
  Redistribution                      None Configured
  dynamic-redistribution:             enabled 
show ip dvmrp interface

Use to display DVMRP parameters for the specified interfaces.

Field descriptions

Interface—Type and specifier of the interface connected to a source. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.

SourceAddress—IP address of the interface or, for an unnumbered interface, address of the loopback interface

Network/Mask—Network and mask of the subnet on which the interface resides

Received Bad Packets/RBdPk—Number of bad packets received on this interface

Received Bad Routes/RBdRt—Number of bad routes received on this interface

Routes Sent/SntRt—Number of bad routes advertised on this interface

Administrative State—Configured state of DVMRP on this interface: enabled or Disabled

Summary Address(es)—Specific summary address or addresses that this interface should advertise

auto-summary—Status of automatic summarization: Enabled or Disabled

metric-offset in—Number of hops by which the router increases a DVMRP route advertised in incoming DVMRP reports

metric-offset out—Number of hops by which the router increases a DVMRP route advertised in outgoing DVMRP reports

announce-filter—Routes advertised by the interface

accept-filter(s)—Names of IP access lists that specify the sources for which the interface accepts routes
Example 1
host1:v3#show ip dvmrp interface
Interface: ATM2/0.1
      SourceAddress:                       1.0.0.1
      Network/Mask:                     1.0.0.1/24
      Received Bad Packets:                      0
      Received Bad Routes:                       0
      Routes Sent:                               0
      Administrative State:                Enabled
      Summary Address(es)          None Configured
      auto-summary:                        Disabed
      metric-offset in:                          1
      metric-offset out:                         0
      announce-filter:                        None
      accept-filter(s)             None Configured
Example 2
host1:boston#show ip dvmrp interface brief
  Interface          SourceAddress   Network/Mask        RBdPk RBdRt SntRt
  atm5/0.14          14.0.1.1        14.0.1.1/8             0     0     2
  atm5/0.15          15.0.1.1        15.0.1.1/8             0     0     2
show ip dvmrp mroute

Use to display information about DVMRP routes to multicast groups.

Field descriptions

(S,G) pair—Source, Group pair value

Uptime—Time, in seconds, that this (S, G) pair entry has been in the routing table

Upstream Prune—Whether the router has sent prune messages for this group

RPF Interface—Interface that provides the shortest path back to the source

Outgoing interface list—Types and specifiers of interfaces through which the VR forwards DVMRP messages, such as atm3/0. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.
Example
host1:boston#show ip dvmrp mroute
IP DVMRP Multicast Routing Table
(40.0.0.0/16,  228.1.1.1)  Uptime: 77
  Upstream Prune: none
  RPF Interface
      atm5/0.40
  Outgoing interface list:
      atm5/0.31 
show ip dvmrp neighbor

Use to display information about DVMRP neighbors.

Specify the brief keyword to view a summary of information.

Field descriptions

Neighbor Address/NbrAddress—IP address of the neighbor

Interface—Interface type and specifier, such as atm3/0. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.

Neighbor upTime/UpTime—Length of time, in seconds, that this router has been a neighbor

Neighbor Major Version/Maj—Major number of the DVMRP version on the neighbor

Neighbor Minor Version/Min—Minor number of the DVMRP version on the neighbor

Neighbor Capabilities/Cap—Capability of the neighbor

Prune/P—Ability to send prune messages

GenerationId/G—Ability to create a generation ID number

Mtrace/M—Ability to trace multicast routes

Netmask/N—Ability to send prunes and grafts with a network mask address

Neighbor State/State—Status of communications with the neighbor

Active—Router is able to communicate with this neighbor

Down—Neighbor is down

Ignoring—Router is not accepting messages from this neighbor

Oneway—Router is receiving messages from the neighbor, but the neighbor does not include the router's IP address in the messages. This state can indicate a starting transition, or a problem.

Generation ID—Number that the neighbor generates each time it boots; when the number changes, the VR discards all information previously learned from the router.

Routes Received—Number of routes received from this neighbor

Bad Routes Received—Number of bad routes received from this neighbor

Bad Packets Received—Number of bad packets received from this neighbor

Example 1
host1:boston#show ip dvmrp neighbor
Neighbor Address:                   14.0.0.1
      Interface:                    atm5/0.14
      Neighbor upTime:                28
      Neighbor Major Version:          3
      Neighbor Minor Version:        255
      Neighbor Capabilities:  Prune  GenerationId  Mtrace  NetMask
      Neighbor State:             Active
      Geneneration ID:        0x3a13fbc2
      Routes Received:                 1
      Bad Routes Received              0
      Bad Packets Received:            0
Example 2
host1:v3#show ip dvmrp neighbor brief
  Interface          NbrAddress      UpTime Maj Min Cap   State
  atm5/0.14          14.0.0.1            32   3 255 PGMN  Active
  atm5/0.15          15.0.0.1            34   3 255 PGMN  Active
show ip dvmrp route

Use to display information about DVMRP routes.

Specify an IP address to display the best route to that address.

Specify an IP address and subnet mask to display the route that exactly matches this IP address and subnet mask

Specify an interface type and specifier to display routes associated with that interface. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.

Specify the brief keyword to view a summary of information.

Field descriptions

Prefix—IP address of the network

Length—Length of the subnet mask for the network

usNbr/Owner—IP address of the upstream neighbor associated with this route or a description of the origin of the route

Dvmrp Local—Route is associated with a directly attached network

Dvmrp Aggregate—Route is an aggregate route determined by summarization

Metric—Metric associated with this interface for this route

ExpireTime—Time, in seconds, until the VR starts the process for removing the route

UpTime—Length of time, in seconds, that the route has been in the DVMRP routing table

Interface—Type and specifier for the interface, such as atm3/0.

Example 1
host1:boston>show ip dvmrp route
Prefix/Length        usNbr/Owner       Metric ExpireTime UpTime Interface
  14.0.0.0/8         Dvmrp Local          1      Never     18   atm5/0.14
    Downstream Interface(s)
        Interface
        atm5/0.15
  15.0.0.0/8         Dvmrp Local          1      Never     18   atm5/0.15
    Downstream Interface(s)
        None
  25.0.0.0/8         14.0.0.1             2        129     11   atm5/0.14
    Downstream Interface(s)
        Interface
        atm5/0.15
Example 2
host1:v3#show ip dvmrp route brief
  Prefix/Length      usNbr/Owner       Metric ExpireTime UpTime Interface
  14.0.0.0/8         Dvmrp Local          1      Never     26   atm5/0.14
  15.0.0.0/8         Dvmrp Local          1      Never     26   atm5/0.15
  25.0.0.0/8         14.0.0.1             2        121     19   atm5/0.14
show ip dvmrp routeNextHop

Use to display information about the next hop.

Field descriptions

addr—IP address of the next-hop router

mlen—Mask length of the next-hop router

ifIndex—SNMP interface index for the interface that connects to the next hop

Type—Description of the next-hop router

leaf—Neighbor with no downstream neighbors

branch—Neighbor with downstream neighbors
Example
host1:boston>show ip dvmrp routeNextHop
  addr/mlen          ifIndex  Type
  172.16.0.0/16            4  leaf
  172.17.0.0/16            4  leaf
  172.18.0.0/16            3  leaf
  172.19.0.0/16            3  leaf
  172.19.0.0/16            4  branch

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