Table Of Contents
Multiprotocol BGP Extensions for IP Multicast Commands
show ip bgp ipv4 multicast summary
Multiprotocol BGP Extensions for IP Multicast Commands
Use the commands in this chapter to configure and monitor multiprotocol Border Gateway Protocol (BGP). Multiprotocol BGP is based upon RFC 2283, Multiprotocol Extensions for BGP-4. For multiprotocol BGP configuration information and examples, refer to the "Configuring Multiprotocol BGP Extensions for IP Multicast" chapter of the Cisco IOS IP and IP Routing Configuration Guide. For BGP configuration information and examples, refer to the "Configuring BGP" chapter of the Cisco IOS IP and IP Routing Configuration Guide. For BGP command descriptions, refer to the "BGP Commands" chapter of the Cisco IOS IP and IP Routing Command Reference.
Commands in this chapter that have been replaced by new or existing commands are no longer documented. Table 84 maps the previous commands with their replacements.
address-family ipv4
To enter address family configuration mode for configuring routing sessions, such as Border Gateway Protocol (BGP), that use standard IPv4 address prefixes, use the address-family ipv4 command in router configuration mode. To disable address family configuration mode, use the no form of this command.
address-family ipv4 [multicast | unicast | vrf vrf-name]
no address-family ipv4 [multicast | unicast | vrf vrf-name]
Syntax Description
Defaults
IPv4 address prefixes are not enabled. Unicast address prefixes are the default when IPv4 address prefixes are configured.
Command Modes
Router configuration
Command History
Usage Guidelines
The address-family ipv4 command places the router in address family configuration mode (prompt: config-router-af), from which you can configure routing sessions that use standard IPv4 address prefixes. To leave address family configuration mode and return to router configuration mode, type exit.
Routing information for address family IPv4 is advertised by default when you configure a BGP routing session using the neighbor remote-as command unless you execute the no bgp default ipv4-unicast command.
The address-family ipv4 command replaces the match nlri and set nlri commands.
Examples
The following example places the router in address family configuration mode for the IPv4 address family:
Router(config)# router bgp 100Router(config-router)# address-family ipv4Router(config-router-af)#The following example places the router in address family configuration mode and specifies multicast address prefixes for the IPv4 address family:
Router(config)# router bgp 100Router(config-router)# address-family ipv4 multicastRouter(config-router-af)#The following example places the router in address family configuration mode and specifies unicast address prefixes for the IPv4 address family:
Router(config)# router bgp 100Router(config-router)# address-family ipv4 unicastRouter(config-router-af)#The following example places the router in address family configuration mode and specifies cisco as the name of the VRF instance to associate with subsequent IPv4 address family configuration mode commands:
Router(config)# router bgp 100Router(config-router)# address-family ipv4 vrf ciscoRouter(config-router-af)#Use this form of the command, which specifies a VRF, only to configure routing exchanges between provider edge (PE) and customer edge (CE) devices.
Related Commands
address-family vpnv4
To enter address family configuration mode for configuring routing sessions, such as Border Gateway Protocol (BGP), that use standard VPNv4 address prefixes, use the address-family vpnv4 command in router configuration mode. To disable address family configuration mode, use the no form of this command.
address-family vpnv4 [unicast]
no address-family vpnv4 [unicast]
Syntax Description
Defaults
VPNv4 address prefixes are not enabled. Unicast address prefixes are the default when VPNv4 address prefixes are configured.
Command Modes
Router configuration
Command History
Usage Guidelines
The address-family vpnv4 command places the router in address family configuration mode (prompt: config-router-af), from which you can configure routing sessions that use VPNv4 address prefixes. To leave address family configuration mode and return to router configuration mode, type exit.
The address-family vpnv4 command replaces the match nlri and set nlri commands.
Examples
The following example places the router in address family configuration mode for the VPNv4 address family:
Router(config)# router bgp 100(config-router)# address-family vpnv4(config-router-af)#The following example places the router in address family configuration mode for the unicast VPNv4 address family:
Router(config)# router bgp 100(config-router)# address-family vpnv4 unicast(config-router-af)#Related Commands
distance mbgp
The distance bgp command replaces the distance mbgp command. See the description of the distance bgp command in the "BGP Commands" chapter for more information.
ip dvmrp metric
To configure the metric associated with a set of destinations for Distance Vector Multicast Routing Protocol (DVMRP) reports, use the ip dvmrp metric command in interface configuration mode. (Note that this command has two different syntax possibilities.) To disable this function, use the no form of this command.
ip dvmrp metric metric [route-map map-name] [mbgp] [list access-list-number] [[protocol process-id] | dvmrp]
no ip dvmrp metric metric [route-map map-name] [mbgp] [list access-list-number] [[protocol process-id] | dvmrp]
Syntax Description
Defaults
No metric is preconfigured. Only directly connected subnets and networks are advertised to neighboring DVMRP routers.
Command Modes
Interface configuration
Command History
10.2
This command was introduced.
11.1
The route-map keyword was added.
11.1(20)CC
This mbgp keyword was added.
12.0(7)T
This mbgp keyword was added.
Usage Guidelines
When Protocol Independent Multicast (PIM) is configured on an interface and DVMRP neighbors are discovered, the Cisco IOS software sends DVMRP report messages for directly connected networks. The ip dvmrp metric command enables DVMRP report messages for multicast destinations that match the access list. Usually, the metric for these routes is 1. Under certain circumstances, you might want to tailor the metric used for various unicast routes. This command lets you configure the metric associated with a set of destinations for Report messages sent out this interface.
You can use the access-list-number argument in conjunction with the protocol and process-id arguments to selectively list the destinations learned from a given routing protocol.
To display DVMRP activity, use the debug ip dvmrp command.
Examples
The following example connects a PIM cloud to a DVMRP cloud. Access list 1 permits the sending of DVMRP reports to the DVMRP routers advertising all sources in the 172.16.35.0 network with a metric of 1. Access list 2 permits all other destinations, but the metric of 0 means that no DVMRP reports are sent for these destinations.
access-list 1 permit 172.16.35.0 0.0.0.255access-list 1 deny 0.0.0.0 255.255.255.255access-list 2 permit 0.0.0.0 255.255.255.255interface tunnel 0ip dvmrp metric 1 list 1ip dvmrp metric 0 list 2The following example redistributes IPv4 multicast routes into DVMRP neighbors with a metric of 1:
interface tunnel 0ip dvmrp metric 1 mbgpRelated Commands
debug ip dvmrp
Displays information on DVMRP packets received and sent.
ip dvmrp accept-filter
Configures an acceptance filter for incoming DVMRP reports.
ip multicast cache-headers
To allocate a circular buffer to store IPv4 multicast packet headers that the router receives, use the ip multicast cache-headers global configuration command. To disable the buffer, use the no form of this command.
ip multicast cache-headers [rtp]
no ip multicast cache-headers
Syntax Description
Defaults
This command is disabled by default.
Command Modes
Global configuration
Command History
11.1
This command was introduced.
11.1(20)CC
The rtp keyword was added.
12.0(7)T
The rtp keyword was added.
Usage Guidelines
You can store IPv4 multicast packet headers in a cache and then display them to determine the following:
•
Who is sending IP multicast packets to which groups
•
•
•
•
•
•
Note
Use the show ip mpacket command to display the buffer.
Examples
The following example allocates a buffer to store IPv4 multicast packet headers:
ip multicast cache-headers
Related Commands
match nlri
The address-family ipv4 and address-family vpnv4 commands replace the match nlri command. See the descriptions of the address-family ipv4 or address-family vpnv4 command for more information.
redistribute dvmrp
To configure redistribution of Distance Vector Multicast Routing Protocol (DVMRP) routes into multiprotocol Border Gateway Protocol (BGP), use the redistribute dvmrp command in address family or router configuration mode. To stop such redistribution, use the no form of this command.
redistribute dvmrp [route-map map-name]
no redistribute dvmrp [route-map map-name]
Syntax Description
Defaults
DVMRP routes are not redistributed into multiprotocol BGP.
Command Modes
Address family configuration
Router configuration
Command History
11.1(20)CC
This command was introduced.
12.0(7)T
Address family configuration mode was added.
Usage Guidelines
Use this command if you have a subset of DVMRP routes in an autonomous system that you want to take the multiprotocol BGP path. Define a route map to further specify which DVMRP routes get redistributed.
Examples
The following router configuration mode example redistributes DVMRP routes to BGP peers that match access list 1:
router bgp 109redistribute dvmrp route-map dvmrp-into-mbgproute-map dvmrp-into-mbgpmatch ip address 1The following address family configuration mode example redistributes DVMRP routes to multiprotocol BGP peers that match access list 1:
router bgp 109address-family ipv4 multicastredistribute dvmrp route-map dvmrp-into-mbgproute-map dvmrp-into-mbgpmatch ip address 1set nlri
The address-family ipv4 and address-family vpnv4 commands replace the set nlri command. See the descriptions of the address-family ipv4 or address-family vpnv4 command for more information.
show ip mbgp
The show ip bgp ipv4 multicast command replaces the show ip mbgp command. See the description of the show ip bgp ipv4 multicast command for more information.
show ip bgp ipv4 multicast
To display IPv4 multicast database-related information, use the show ip bgp ipv4 multicast command in EXEC mode.
show ip bgp ipv4 multicast [command]
Syntax Description
command
(Optional) Any multiprotocol Border Gateway Protocol (BGP) command supported by the show ip bgp ipv4 multicast command.
Command Modes
EXEC
Command History
Usage Guidelines
Use this command in conjunction with the show ip rpf command to determine if IP multicast routing is using multiprotocol BGP routes.
To determine which multiprotocol BGP commands are supported by the show ip bgp ipv4 multicast command, enter the following while in EXEC mode:
Router# show ip bgp ipv4 multicast ?The show ip bgp ipv4 multicast command replaces the show ip mbgp command.
Examples
The following is sample output from the show ip bgp ipv4 multicast command:
Router# show ip bgp ipv4 multicastMBGP table version is 6, local router ID is 192.168.200.66Status codes: s suppressed, d damped, h history, * valid, > best, i - internalOrigin codes: i - IGP, e - EGP, ? - incompleteNetwork Next Hop Metric LocPrf Weight Path*> 10.0.20.16/28 0.0.0.0 0 0 32768 i*> 10.0.35.16/28 0.0.0.0 0 0 32768 i*> 10.0.36.0/28 0.0.0.0 0 0 32768 i*> 10.0.48.16/28 0.0.0.0 0 0 32768 i*> 10.2.0.0/16 0.0.0.0 0 0 32768 i*> 10.2.1.0/24 0.0.0.0 0 0 32768 i*> 10.2.2.0/24 0.0.0.0 0 0 32768 i*> 10.2.3.0/24 0.0.0.0 0 0 32768 i*> 10.2.7.0/24 0.0.0.0 0 0 32768 i*> 10.2.8.0/24 0.0.0.0 0 0 32768 i*> 10.2.10.0/24 0.0.0.0 0 0 32768 i*> 10.2.11.0/24 0.0.0.0 0 0 32768 i*> 10.2.12.0/24 0.0.0.0 0 0 32768 i*> 10.2.13.0/24 0.0.0.0 0 0 32768 iTable 85 describes the significant fields shown in the display.
Related Commands
show ip mbgp summary
The show ip bgp ipv4 multicast summary command replaces the show ip mbgp summary command. See the description of the show ip bgp ipv4 multicast summary command for more information.
show ip bgp ipv4 multicast summary
To display a summary of IPv4 multicast database-related information, use the show ip bgp ipv4 multicast summary command in EXEC mode.
show ip bgp ipv4 multicast summary
Syntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
Usage Guidelines
The show ip bgp ipv4 multicast summary command replaces the show ip mbgp summary command.
Examples
The following is sample output from the show ip bgp ipv4 multicast summary command:
Router# show ip bgp ipv4 multicast summaryBGP router identifier 10.0.33.34, local AS number 34BGP table version is 5, main routing table version 14 network entries and 6 paths using 604 bytes of memory5 BGP path attribute entries using 260 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory2 BGP community entries using 48 bytes of memory2 BGP route-map cache entries using 32 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBGP activity 8/28 prefixes, 12/0 paths, scan interval 15 secsNeighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd10.0.33.35 4 35 624 624 5 0 0 10:13:46 3Table 86 describes the significant fields shown in the display.
Related Commands
