Guest

Cisco IOS Software Releases 12.0 S

Selective Multicast Virtual Route Forwarding (MVRF) Downloading

  • Viewing Options

  • PDF (247.9 KB)
  • Feedback
Selective MVRF Download Feature on Cisco 12000 Series Routers

Table Of Contents

Selective MVRF Download Feature on Cisco 12000 Series Routers

Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature Overview

Restrictions

Related Documents

Supported Platforms

Edge Cards

Core Cards

Supported Standards, MIBs, and RFCs

Standards

MIBs

RFCs

Prerequisites

Configuration Tasks

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

Command Reference

ip multicast mdfs download all

show ip mds summary

Glossary


Selective MVRF Download Feature on Cisco 12000 Series Routers


Part Number OL-11099-01 Rev. A0 August 28, 2006

Feature History

Release
Modification

12.0(32)SY

This feature was introduced on the Cisco 12000 series routers.


This feature module contains the following sections:

Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites

Configuration Tasks

Verifying and Monitoring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature

Configuring and Verifying Selective Multicast Virtual Route Forwarding (MVRF) Downloading

Command Reference

Glossary

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:

The ip multicast-routing distributed command must be executed before using the ip multicast mdfs download all command to configure non-selective Multicast Virtual Route Forwarding (MVRF) downloading.


Note Changing the configuration of the selective Multicast Virtual Route Forwarding (MVRF) downloading feature by executing the ip multicast mdfs download all command or the no ip multicast mdfs download all command will cause MDFS to reload on all line cards.


Related Documents

For information on configuring Cisco 12000 series routers, refer to the following documents:

Modular Quality of Service Command-Line Interface

Stacked VLAN Processing

Cisco IOS Quality of Service Solutions Command Reference

Cisco 12000 Series Router Configuration Guide for Cisco IOS

Any Transport over MPLS

Any Transport over MPLS (AToM): Layer 2 QoS (Quality of Service)

MPLS VPNs over IP Tunnels

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

Ethernet Line Cards

4-port Gigabit Ethernet ISE Line Card (Minimum 512 Megabytes memory)

Core Cards

POS Line Cards

4-port OC-12c POS MM (Minimum 512 Megabytes memory)

1-port OC-48 (Minimum 512 Megabytes memory)

16-port OC-3 (Minimum 512 Megabytes memory)

Cisco 12000 SIP-600 SPAs

1-port 10-Gigabit Ethernet SPA

5-port Gigabit Ethernet SPA

10-port Gigabit Ethernet SPA

1-port OC-192c/STM-64 POS SPA

2-port OC48-POS/RPR SPA

Cisco 12000 SIP-401/501/601 SPAs

8-port FastEthernet SPA

8-port FastEthernet SPA Version 2 (12.0(32)SY)

1-port 10-Gigabit Ethernet SPA

1-port 10-Gigabit Ethernet SPA Version 2 (12.0(32)SY)

2-port Gigabit Ethernet SPA

2-port Gigabit Ethernet SPA hiVersion 2 (12.0(32)SY)

5-port Gigabit Ethernet SPA

5-port Gigabit Ethernet SPA Version 2 (12.0(32)SY)

10-port Gigabit Ethernet SPA

10-port Gigabit Ethernet SPA Version 2 (12.0(32)SY)

1-port OC-192c/STM-64 POS SPA

2-port OC48-POS/RPR SPA

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

Standards
Title

IEEE 802.1Q


MIBs

MIBs
MIBs Link

PWE3-MIB

VPDN-MIB

IF-MIB

No other new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFCs
Title

No new or modified RFCs are supported by this feature.


Prerequisites

Before you configure the selective Multicast Virtual Route Forwarding (MVRF) downloading feature, ensure that the network is configured as follows:

The ip multicast-routing distributed command must be executed before using the ip multicast mdfs download all command to configure non-selective Multicast Virtual Route Forwarding (MVRF) downloading.

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

Verifying and Monitoring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading 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

 
Command
Purpose

Step 1 

Router#config t

Router(config)#

Enters configuration mode.

Step 2 

Router(config)#ip multicast-routing distributed

Router(config)#

Enables MDS globally.

For example:

Router(config)#ip multicast-routing distributed

Step 3 

Router(config)#ip multicast mdfs download all

Disables the selective Multicast Virtual Route Forwarding (MVRF) downloading feature.

For example:

Router(config)#ip multicast mdfs download all

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:

Command
Purpose

Router#show ip mds vrf vpn1 summary


Shows the status of the Selective Multicast Virtual Route Forwarding (MVRF) downloading feature. For example:

Router#show ip mds vrf vpn1 summary

Master lc: 1, number of ifs in master lc: 1

Selective MVRF download is in effect

0 routes

IP multicast MDFS forwarding information and statistics:

Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group

N - Not MDFS switchable, F - Not all MDFS switchable, O - OIF Null

V - MVPN packets not MDFS switchable

R - In-ratelimit, A - In-access, M - MTU mismatch, P - Register set

C - In-CAR, J - Join SPT, L - Local

Z - Multicast Tunnel

Y - Joined MDT-data group, y - Sending to MDT-data group

Interface state: Interface, Next-Hop, Mac header


Router#show ip mds vrf <vpn> download interface <slot>


Shows the list of IDBs that are in the MVRF on the specified line card slot. For example:

Router#show ip mds vrf <vpn> download interface <slot>

List of IDBs on slot 3 in <vpn>


Idx Interface name

19 GigabitEthernet3/1.1


Router#show ip mds vrf <vpn> download linecard


Shows the line cards that have mroutes downloaded for a given mVRF. For example:

Router#show ip mds vrf <vpn> download linecard

Mroutes Downloaded to following line cards
3  


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

Example of Verifying a Selective Multicast Virtual Route Forwarding (MVRF) Configuration

Example of Configuring the Selective Multicast Virtual Route Forwarding (MVRF) Downloading Feature

Router#config t

Router(config)#ip multicast-routing distributed

Router(config)ip multicast mdfs download all

Example 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 co

State: * - Fast Switched, D - Distributed Fast Switched
       H - Hardware Switching Enabled
Address          Interface                FS  Mpackets In/Out
71.0.0.1         Tunnel0                  D   0/0
66.0.0.1         POS1/0.1                 D   0/0

Display the multicast route summary for the vrf vpn1 on the line card in slot on 1.


LC-Slot1#sh ip mds vrf vpn1 sum
 Master lc: 1, number of ifs in master lc: 1 
3 routes
IP multicast MDFS forwarding information and statistics:
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group
       N - Not MDFS switchable, F - Not all MDFS switchable, O - OIF Null
       V - MVPN packets not MDFS switchable
       R - In-ratelimit, A - In-access, M - MTU mismatch, P - Register set
       C - In-CAR, J - Join SPT, L - Local
       Z - Multicast Tunnel
       Y - Joined MDT-data group, y - Sending to MDT-data group

Interface state: Interface, Next-Hop, Mac header

(*, 227.0.1.1), 
  Incoming interface: Null
  Pkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNM
(*, 227.0.1.2), 
  Incoming interface: Null
  Pkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNM
(*, 224.0.1.40), 
  Incoming interface: Null
  Pkts: 0, uptime: 00:33:19, last used: never, Kbps: 0, fast-flags: DNML

Display the multicast route summary for the vrf vpn1 on the line card in slot on 6.


LC-Slot6#sh ip mds vrf vpn1 sum
 Master lc: 1, number of ifs in master lc: 1
 Selective MVRF download is in effect
0 routes
IP multicast MDFS forwarding information and statistics:
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group
       N - Not MDFS switchable, F - Not all MDFS switchable, O - OIF Null
       V - MVPN packets not MDFS switchable
       R - In-ratelimit, A - In-access, M - MTU mismatch, P - Register set
       C - In-CAR, J - Join SPT, L - Local
       Z - Multicast Tunnel
       Y - Joined MDT-data group, y - Sending to MDT-data group

Interface state: Interface, Next-Hop, Mac header

LC-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

Release
Modification

12.0(32)SY

This command was introduced.


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 Changing the configuration of the selective Multicast Virtual Route Forwarding (MVRF) downloading feature by executing the ip multicast mdfs download all command or the no ip multicast mdfs download all command will cause MDFS to reload on all line cards.


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

Command
Description

show ip mds summary

Displays the status of the selective MVRF download feature.


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

Release
Modification

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 summary 

Master lc: 1, number of ifs in master lc: 1
 Selective MVRF download is in effect
0 routes

IP multicast MDFS forwarding information and statistics:
Flags: N - Not MDFS switchable, F - Not all MDFS switchable, O - OIF Null
       R - In-ratelimit, A - In-access, M - MTU mismatch, P - Register set

Interface state: Interface, Next-Hop, Mac header

(*, 224.2.170.73), 
  Incoming interface: Null
  Pkts: 0, last used: never, Kbps: 0, fast-flags: N
(128.97.62.86, 224.2.170.73) [31]
  Incoming interface: Fddi3/0/0
  Pkts: 3045, last used: 00:00:03, Kbps: 0, fast-flags: M
(128.223.3.7, 224.2.170.73) [334]
  Incoming interface: Fddi3/0/0
  Pkts: 0, last used: never, Kbps: 0, fast-flags: M

Table 1 describes the fields in the display.

Table 1 show ip mds summary Field Descriptions 

Field
Description

(128.97.62.86, 224.2.170.73) [31]

Source and group addresses. Number in [ ] is the hash bucket for the route.

Incoming interface

Expected interface for a multicast packet from the source. If the packet is not received on this interface, it is discarded.

Pkts

Total number of packets switched by that entry.

last used

Time when this MFIB entry was used to switch a packet.

Kbps

Kilobits per second of the switched traffic.


Glossary

ACL

Access Control List

BPDU

Bridge Protocol Data Unit

CE

Customer Edge

CDP

Cisco Discovery Protocol

EVCS

Ethernet Virtual Connection Service

L2PT

Layer 2 Protocol Tunnelling

MAC

Media Access Control

MPLS

Multi Protocol Label Switching

PE

Provider Edge

QoS

Quality of Service

Split Horizon

A packet forwarding technique that prevents packets received from an emulated VC from being forwarded to another emulated VC. This technique is important for creating loop-free paths in a full-meshed network.

STP

Spanning-Tree Protocol

TLS

Transparent LAN Service

VC

Virtual Connection

VFI

Virtual Forwarding Instance

VPLS

Virtual Private LAN Service

VPN

Virtual Private Network

VRF

A Virtual Private Network (VPN) routing/forwarding instance.

VTP

Virtual Terminal Protocol