Catalyst 6500 Release 12.2SX Software Configuration Guide

Configuring IPv6 Multicast PFC3 and DFC3 Layer 3 Switching

The PFC3 and DFC3 provide hardware support for IPv6 multicast traffic. Use these publications to configure IPv6 multicast in Cisco IOS Release 12.2SX:

•The Cisco IOS IPv6 Configuration Library, "Implementing IPv6 Multicast":

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/12-2sy/ipv6-12-2sy-book.html

•The Cisco IOS IPv6 Command Reference:

http://www.cisco.com/en/US/docs/ios/ipv6/command/reference/ipv6_book.html

Tip For additional information about Cisco Catalyst 6500 Series Switches (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html

Participate in the Technical Documentation Ideas forum

These sections provide additional information about IPv6 multicast support in Cisco IOS Release 12.2SX:

•Features that Support IPv6 Multicast

•IPv6 Multicast Guidelines and Restrictions

•New or Changed IPv6 Multicast Commands

•Configuring IPv6 Multicast Layer 3 Switching

•Using show Commands to Verify IPv6 Multicast Layer 3 Switching

Features that Support IPv6 Multicast

These features support IPv6 multicast:

•RPR redundancy mode—See Chapter 7 "Configuring RPR Supervisor Engine Redundancy."

•Multicast Listener Discovery version 2 (MLDv2) snooping—See Chapter 36 "Configuring MLD Snooping for IPv6 Multicast Traffic."

Note MLDv1 snooping is not supported.

•IPv6 Multicast rate limiters—See Chapter 52 "Configuring Denial of Service Protection."

•IPv6 Multicast: Bootstrap Router (BSR)—See the BSR information in the Cisco IOS IPv6 Configuration Library and the Cisco IOS IPv6 Command Reference.

•IPv6 Access Services—See this publication for more information:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/config_library/15-sy/ipv6-15-sy-library.html

•SSM mapping for IPv6—See this publication for more information:

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/config_library/15-sy/ipv6-15-sy-library.html

IPv6 Multicast Guidelines and Restrictions

These guidelines and restrictions apply to IPv6 multicast support in Cisco IOS Release 12.2SX:

•The PFC3 and DFC3 provide hardware support for the following:

–Completely switched IPv6 multicast flows

–IPv6 PIM-Sparse Mode (PIM-SM) (S,G) and (*,G) forwarding

Note Release 12.2(33)SXH provides initial support for IPv6 PIM-SM (*,G) forwarding.

–Multicast RPF check for IPv6 PIM-SM (S,G) traffic using the NetFlow table

–Rate limiting of IPv6 PIM-SM (S,G) traffic that fails the multicast RPF check

–Static IPv6 multicast routes

–SSM Mapping for IPv6 (PIM-SSM)

–IPv6 multicast forwarding information base (MFIB) using the NetFlow table

–IPv6 distributed MFIB (dMFIB) using the NetFlow table

–Link-local and link-global IPv6 multicast scopes

–Egress multicast replication with the ipv6 mfib hardware-switching command

–Ingress interface statistics for multicast routes (egress interface statistics not available)

–RPR redundancy mode (see Chapter 7 "Configuring RPR Supervisor Engine Redundancy")

–Ingress and egress PFC QoS (see Chapter 43 "Configuring PFC QoS")

–Input and output Cisco access-control lists (ACLs)

•The PFC3 and DFC3 do not provide hardware support for the following:

–Partially switched IPv6 multicast flows

–Multicast RPF check for PIM-SM (*,G) traffic

–Multicast helper maps

–Site-local multicast scopes

–Manually configured IPv6 over IPv4 tunnels

–IPv6 multicast 6to4 tunnels

–IPv6 multicast automatic tunnels

–IPv6 over GRE tunnels

–IPv6-in-IPv6 PIM register tunnels

–IPv6 multicast basic ISATAP tunnels

–ISATAP tunnels with embedded 6to4 tunnels

New or Changed IPv6 Multicast Commands

See the Cisco IOS Master Command List for information about these IPv6 multicast commands:

•ipv6 mfib hardware-switching

•mls rate-limit multicast ipv6 (see Chapter 52 "Configuring Denial of Service Protection")

•show ipv6 mfib

•show mls rate-limit (see Chapter 52 "Configuring Denial of Service Protection")

•show platform software ipv6-multicast

•show tcam interface

Configuring IPv6 Multicast Layer 3 Switching

To configure IPv6 multicast Layer 3 switching, perform this task:

Using show Commands to Verify IPv6 Multicast Layer 3 Switching

These sections describe how to use show commands to verify IPv6 multicast Layer 3 switching:

•Verifying MFIB Clients

•Displaying the Switching Capability

•Verifying the (S,G) Forwarding Capability

•Verifying the (*,G) Forwarding Capability

•Verifying the Subnet Entry Support Status

•Verifying the Current Replication Mode

•Displaying the Replication Mode Auto-Detection Status

•Displaying the Replication Mode Capabilities

•Displaying Subnet Entries

•Displaying the IPv6 Multicast Summary

•Displaying the NetFlow Hardware Forwarding Count

•Displaying the FIB Hardware Bridging and Drop Counts

•Displaying the Shared and Well-Known Hardware Adjacency Counters

Note The show commands in the following sections are for a switch with a DFC3-equipped switching module in slot 1 and a Supervisor Engine 720 with a PFC3 in slot 6.

Verifying MFIB Clients

This example shows the complete output of the show ipv6 mrib client command:

Router# show ipv6 mrib client 

IP MRIB client-connections

mfib ipv6:81    (connection id 0)

igmp:124        (connection id 1)

pim:281 (connection id 2)

slot 1  mfib ipv6 rp agent:15   (connection id 3)

slot 6  mfib ipv6 rp agent:15   (connection id 4)

This example shows how to display the MFIB client running on the route processor (RP):

Router# show ipv6 mrib client | include ^mfib ipv6 

mfib ipv6:81    (connection id 0)

This example shows how to display the MFIB clients running on the PFC3 and any DFC3s:

Router# show ipv6 mrib client | include slot 

slot 1  mfib ipv6 rp agent:15   (connection id 3)

slot 6  mfib ipv6 rp agent:15   (connection id 4)

Displaying the Switching Capability

This example displays the complete output of the show platform software ipv6-multicast capability command:

Router# show platform software ipv6-multicast capability 

 Hardware switching for IPv6 is enabled

 (S,G) forwarding for IPv6 supported using Netflow

 (*,G) bridging for IPv6 is supported using FIB

 Directly-connected entries for IPv6 is supported using ACL-TCAM.

Current System HW Replication Mode : Ingress

Auto-detection of Replication Mode : ON

Slot Replication-Capability Replication-Mode

   1 Ingress                Ingress 

   2 Egress                 Ingress 

   6 Egress                 Ingress 

   8 Ingress                Ingress 

Verifying the (S,G) Forwarding Capability

This example shows how to verify the (S,G) forwarding:

Router# show platform software ipv6-multicast capability | include (S,G) 

 (S,G) forwarding for IPv6 supported using Netflow

Verifying the (*,G) Forwarding Capability

This example shows how to verify the (*,G) forwarding:

Router# show platform software ipv6-multicast capability | include (\*,G) 

 (*,G) bridging for IPv6 is supported using FIB

Verifying the Subnet Entry Support Status

This example shows how to verify the subnet entry support status:

Router# show platform software ipv6-multicast capability | include entries 

 Directly-connected entries for IPv6 is supported using ACL-TCAM.

Verifying the Current Replication Mode

This example shows how to verify the current replication mode:

Router# show platform software ipv6-multicast capability | include Current 

Current System HW Replication Mode : Ingress

Note Enter the no ipv6 mfib hardware-switching replication-mode ingress command to enable replication mode auto-detection.

Displaying the Replication Mode Auto-Detection Status

This example shows how to display the replication mode auto-detection status:

Router# show platform software ipv6-multicast capability | include detection 

Auto-detection of Replication Mode : ON

Displaying the Replication Mode Capabilities

This example shows how to display the replication mode capabilities of the installed modules:

Router# show platform software ipv6-multicast capability | begin ^Slot 

Slot Replication-Capability Replication-Mode

   1 Ingress                Ingress 

   2 Egress                 Ingress 

   6 Egress                 Ingress 

   8 Ingress                Ingress 

Displaying Subnet Entries

This example shows how to display subnet entries:

Router# show platform software ipv6-multicast connected 

IPv6 Multicast Subnet entries

Flags : H - Installed in ACL-TCAM

        X - Not installed in ACL-TCAM due to

            label-full exception

Interface: Vlan20 [ H ]

         S:20::1 G:FF00::

Interface: Vlan10 [ H ]

         S:10::1 G:FF00::

Note In this example, there are subnet entries for VLAN 10 and VLAN 20.

Displaying the IPv6 Multicast Summary

This example shows how to display the IPv6 multicast summary:

Router# show platform software ipv6-multicast summary 

IPv6 Multicast Netflow SC summary on Slot[1]:

Shortcut Type               Shortcut count

---------------------------+--------------

(S, G)                      100

(*, G)                      0

IPv6 Multicast FIB SC summary on Slot[1]:

Shortcut Type               Shortcut count

---------------------------+--------------

(*, G/128)                  10

(*, G/m)                    47

IPv6 Multicast Netflow SC summary on Slot[6]:

Shortcut Type               Shortcut count

---------------------------+--------------

(S, G)                      100

(*, G)                      0

IPv6 Multicast FIB SC summary on Slot[6]:

Shortcut Type               Shortcut count

---------------------------+--------------

(*, G/128)                  10

(*, G/m)                    47

Displaying the NetFlow Hardware Forwarding Count

This example shows how to display the NetFlow hardware forwarding count:

Router# show platform software ipv6-multicast summary 

IPv6 Multicast Netflow SC summary on Slot[1]:

Shortcut Type               Shortcut count

---------------------------+--------------

(S, G)                      100

(*, G)                      0

<...Output deleted...>

IPv6 Multicast Netflow SC summary on Slot[6]:

Shortcut Type               Shortcut count

---------------------------+--------------

(S, G)                      100

(*, G)                      0

<...Output truncated...>

Note The NetFlow (*, G) count is always zero because PIM-SM (*,G) forwarding is supported in software on the RP.

Displaying the FIB Hardware Bridging and Drop Counts

This example shows how to display the FIB hardware bridging and drop hardware counts:

Router# show platform software ipv6-multicast summary | begin FIB 

IPv6 Multicast FIB SC summary on Slot[1]:

Shortcut Type               Shortcut count

---------------------------+--------------

(*, G/128)                  10

(*, G/m)                    47

<...Output deleted...>

IPv6 Multicast FIB SC summary on Slot[6]:

Shortcut Type               Shortcut count

---------------------------+--------------

(*, G/128)                  10

(*, G/m)                    47

Note•The (*, G/128) value is a hardware bridge entry count.

•The (*, G/m) value is a hardware bridge/drop entry count.

Displaying the Shared and Well-Known Hardware Adjacency Counters

The show platform software ipv6-multicast shared-adjacencies command displays the shared and well-known hardware adjacency counters used for IPv6 multicast by entries in FIB and ACL-TCAM.

Router# show platform software ipv6-multicast shared-adjacencies 

---- SLOT [1] ----

Shared IPv6 Mcast Adjacencies Index  Packets       Bytes

----------------------------- ------ ------------- ------------------

Subnet bridge adjacency       0x7F802  0             0                 

Control bridge adjacency      0x7      0             0                 

StarG_M bridge adjacency      0x8      0             0                 

S_G bridge adjacency          0x9      0             0                 

Default drop adjacency        0xA      0             0                 

StarG (spt == INF) adjacency  0xB      0             0                 

StarG (spt != INF) adjacency  0xC      0             0                 

---- SLOT [6] ----

Shared IPv6 Mcast Adjacencies Index  Packets       Bytes

----------------------------- ------ ------------- ------------------

Subnet bridge adjacency       0x7F802  0             0                 

Control bridge adjacency      0x7      0             0                 

StarG_M bridge adjacency      0x8      0             0                 

S_G bridge adjacency          0x9      0             0                 

Default drop adjacency        0xA      28237         3146058           

StarG (spt == INF) adjacency  0xB      0             0                 

StarG (spt != INF) adjacency  0xC      0             0 

Tip For additional information about Cisco Catalyst 6500 Series Switches (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html

Participate in the Technical Documentation Ideas forum