That isn't a new enough image for the feature. When you have questions like this simply go to the command reference and see when it was introduced.
address-family ipv4 (BGP) To enter address family or router scope address family configuration mode to configure a routing session using standard IP Version 4 (IPv4) address prefixes, use the address-family ipv4 command in router configuration or router scope configuration mode. To exit address family configuration mode and remove the IPv4 address family configuration from the running configuration, use the no form of this command. Syntax Available Under Router Configuration Mode address-family ipv4 [mdt | multicast | tunnel | unicast [vrf vrf-name] | vrf vrf-name] no address-family ipv4 [mdt | multicast | tunnel | unicast [vrf vrf-name] | vrf vrf-name] Syntax Available Under Router Scope Configuration Mode address-family ipv4 [mdt | multicast | unicast] no address-family ipv4 [mdt | multicast | unicast] Syntax Description mdt (Optional) Specifies an IPv4 multicast distribution tree (MDT) address family session. multicast (Optional) Specifies IPv4 multicast address prefixes. tunnel (Optional) Specifies an IPv4 routing session for multipoint tunneling. unicast (Optional) Specifies IPv4 unicast address prefixes. This is the default. vrf vrf-name (Optional) Specifies the name of the VPN routing and forwarding (VRF) instance to associate with subsequent IPv4 address family configuration mode commands. Command Default IPv4 address prefixes are not enabled. Command Modes Router configuration (config-router) Router scope configuration (config-router-scope) Command History Release Modification 12.0(5)T This command was introduced. This command replaced the match nlri and set nlri commands. 12.0(28)S This command was integrated into Cisco IOS Release 12.0(28)S, and the tunnel keyword was added. 12.0(29)S The mdt keyword was added. 12.0(30)S Support for the Cisco 12000 series Internet router was added. 12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA. 12.2(31)SB2 This command was integrated into Cisco IOS Release 12.2(31)SB2. 12.2(33)SRB Support for the router scope configuration mode was added. 12.2(33)SXH This command was integrated into Cisco IOS Release 12.2(33)SXH. 12.2(33)SB This command was integrated into Cisco IOS Release 12.2(33)SB. Cisco IOS XE Release 2.1 This command was introduced on Cisco ASR 1000 Series Routers. 12.4(20)T The mdt keyword was added. Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr. Instructor - IPexpert, Inc. Mailto: [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com <http://www.ipexpert.com/> From: [email protected] [mailto:[email protected]] On Behalf Of Rob Pool Sent: Sunday, December 05, 2010 12:16 PM To: [email protected] Subject: [OSL | CCIE_RS] Vol1 Lab 30 Task 9 I seem to be missing a command. The referense guide shows: address-family ipv4 mdt, but my image doesn't seem to contain that command. I'm running (C2801-ADVENTERPRISEK9-M), Version 12.4(11)T. Does anyone have any suggestions? R2(config-router)#address-family ipv4 ? multicast Address Family modifier unicast Address Family modifier vrf Specify parameters for a VPN Routing/Forwarding instance Thanks, Rob
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