Table Of Contents
Selective MVRF Download Feature on Cisco 12000 Series Routers
Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature Overview
Supported Standards, MIBs, and RFCs
Configuring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
Verifying and Monitoring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
Configuring and Verifying Selective Multicast Virtual Route Forwarding (MVRF) Downloading
Example of Configuring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
Example of Verifying a Selective Multicast Virtual Route Forwarding (MVRF) Configuration
ip multicast mdfs download all
Selective MVRF Download Feature on Cisco 12000 Series Routers
Part Number OL-11099-01 Rev. A0 August 28, 2006
Feature History
This feature module contains the following sections:
•
Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature Overview
•
•
•
Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature Overview
The selective Multicast Virtual Route Forwarding (MVRF) downloading feature disables the automatic downloading of VRF multicast routes for a specific VRF to any line card that does not have a forwarding interface in that VRF. Starting with Release 12.0(32)SY, this is the default behavior.
The selective MVRF Download feature allows Multicast Virtual Routing and Forwarding (MVRF) routing instances to be downloaded to line cards as needed instead of downloading to all line cards. The advantage is that this action saves line card memory by reducing the number of mroutes configured and lowers the use of the CPU by the line card.
This feature is set by default so the ip multicast command is modified with the addition of new keywords to bypass the feature if needed. The modified command is ip multicast mdfs download all. Two new commands show ip mds vrf vpn download interface slot and show ip mds vrf vpn download slot-list are added to monitor this feature.
Two show commands have been changed. For monitoring the MDFS Route Processor, use the show ip multicast command. For monitoring the MDFS line card, use the show ip mds vrf vrf_name summary command to display the multicast routes configured on a line card in the context of a VRF. This show command displays a flag indicating the feature is in effect on the line card.
Restrictions
In this release, the following limitation and restriction applies:
•
Note
Related Documents
For information on configuring Cisco 12000 series routers, refer to the following documents:
•
•
•
•
•
•
•
Supported Platforms
The Selective Virtual Route Forwarding (SVRF) downloading feature is supported in Cisco IOS Release 12.0(32)SY on the following Integrated Services Engine (ISE) line cards and SPAs:
Edge Cards
•
–
Core Cards
•
–
–
–
•
–
–
–
–
–
•
–
–
–
–
–
–
–
–
–
–
–
–
Supported Standards, MIBs, and RFCs
The selective Multicast Virtual Route Forwarding (MVRF) downloading on Cisco 12000 Series Routers feature supports the following standards, MIBs, and RFCs.
Standards
MIBs
RFCs
Prerequisites
Before you configure the selective Multicast Virtual Route Forwarding (MVRF) downloading feature, ensure that the network is configured as follows:
•
Configuration Tasks
See the following sections for configuration tasks for the selective Multicast Virtual Route Forwarding (MVRF) feature.
•
•
Configuring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
You must execute the ip multicast-routing distributed command before using the ip multicast mdfs download all command to configure non-selective Multicast Virtual Route Forwarding (MVRF) downloading.
Refer to the steps below to disable the selective Multicast Virtual Route Forwarding (MVRF) downloading feature.
Steps for Disabling the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
Verifying and Monitoring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
To verify and monitor the selective Multicast Virtual Route Forwarding (MVRF) downloading feature, use the following show commands:
Configuring and Verifying Selective Multicast Virtual Route Forwarding (MVRF) Downloading
This section provides the following examples for configuring and verifying Selective Multicast Virtual Route Forwarding (MVRF) downloading on provider edge routers:
•
•
Example of Configuring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature
Router#config tRouter(config)#ip multicast-routing distributed
Router(config)ip multicast mdfs download allExample of Verifying a Selective Multicast Virtual Route Forwarding (MVRF) Configuration
Display the interfaces enabled for PIM on a line card for the vrf vpn1.
PE2#sh ip pim vrf vpn1 int coState: * - Fast Switched, D - Distributed Fast SwitchedH - Hardware Switching EnabledAddress Interface FS Mpackets In/Out71.0.0.1 Tunnel0 D 0/066.0.0.1 POS1/0.1 D 0/0Display the multicast route summary for the vrf vpn1 on the line card in slot on 1.
LC-Slot1#sh ip mds vrf vpn1 sumMaster lc: 1, number of ifs in master lc: 13 routesIP multicast MDFS forwarding information and statistics:Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM GroupN - Not MDFS switchable, F - Not all MDFS switchable, O - OIF NullV - MVPN packets not MDFS switchableR - In-ratelimit, A - In-access, M - MTU mismatch, P - Register setC - In-CAR, J - Join SPT, L - LocalZ - Multicast TunnelY - Joined MDT-data group, y - Sending to MDT-data groupInterface state: Interface, Next-Hop, Mac header(*, 227.0.1.1),Incoming interface: NullPkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNM(*, 227.0.1.2),Incoming interface: NullPkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNM(*, 224.0.1.40),Incoming interface: NullPkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNMLDisplay the multicast route summary for the vrf vpn1 on the line card in slot on 6.
LC-Slot6#sh ip mds vrf vpn1 sumMaster lc: 1, number of ifs in master lc: 1Selective MVRF download is in effect0 routesIP multicast MDFS forwarding information and statistics:Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM GroupN - Not MDFS switchable, F - Not all MDFS switchable, O - OIF NullV - MVPN packets not MDFS switchableR - In-ratelimit, A - In-access, M - MTU mismatch, P - Register setC - In-CAR, J - Join SPT, L - LocalZ - Multicast TunnelY - Joined MDT-data group, y - Sending to MDT-data groupInterface state: Interface, Next-Hop, Mac headerLC-Slot6#Command Reference
This section documents new commands for the selective Multicast Virtual Route Forwarding (MVRF) feature. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.
ip multicast mdfs download all
To disable the selective Multicast Virtual Route Forwarding (MVRF) downloading feature, use the ip multicast mdfs download all global configuration command. To re-enable the selective Multicast Virtual Route Forwarding (MVRF) downloading feature, use the no form of this command.
ip multicast mdfs download all
no ip multicast mdfs download all
Syntax Description
This command has no arguments or keywords.
Defaults
Disabled
Command Modes
Global configuration
Command History
Usage Guidelines
The selective Multicast Virtual Route Forwarding (MVRF) downloading feature is enabled by default.
The selective MVRF Download feature allows Multicast Virtual Routing and Forwarding (MVRF) routing instances to be downloaded to line cards as needed instead of downloading to all line cards. The advantage is that this action saves line card memory by reducing the number of mroutes configured and lowers the use of the CPU by the line card.
Note
Use the show ip mds summary command to display the status of the selective MVRF download feature.
Examples
The following example disables the selective MVRF download feature:
ip multicast mdfs download all
Related Commands
show ip mds summary
To display a summary of the MFIB table for multicast distributed switching (MDS), use the show ip mds summary EXEC command.
show ip mds summary
Syntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
11.2(11)GS
This command was introduced.
12.0(32)SY
The selective download status line was added to the output for this command.
Usage Guidelines
Use this command on a line card. On a Cisco 12000 series router only, line card commands can be executed from the RP using the following syntax:
execute [slot slot-number | all] command
The command is any of the line card show commands, such as show ip mds summary and show ip mds forward.
Examples
The following is sample output from the show ip mds summary command:
Router# show ip mds summaryMaster lc: 1, number of ifs in master lc: 1Selective MVRF download is in effect0 routesIP multicast MDFS forwarding information and statistics:Flags: N - Not MDFS switchable, F - Not all MDFS switchable, O - OIF NullR - In-ratelimit, A - In-access, M - MTU mismatch, P - Register setInterface state: Interface, Next-Hop, Mac header(*, 224.2.170.73),Incoming interface: NullPkts: 0, last used: never, Kbps: 0, fast-flags: N(128.97.62.86, 224.2.170.73) [31]Incoming interface: Fddi3/0/0Pkts: 3045, last used: 00:00:03, Kbps: 0, fast-flags: M(128.223.3.7, 224.2.170.73) [334]Incoming interface: Fddi3/0/0Pkts: 0, last used: never, Kbps: 0, fast-flags: MTable 1 describes the fields in the display.
Glossary
CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.
All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0601R)
©2006 Cisco Systems, Inc. All rights reserved.
Guest
