Fundamentals of BGP Operations - Multiprotocol BGP - Configuration of Multiprotocol BGP

4 important questions on Fundamentals of BGP Operations - Multiprotocol BGP - Configuration of Multiprotocol BGP

When MP-BGP  is activated. What command can disable automatic advertisment of IPv4 prefixes?

R1(config) Router bgp 1
R1 (config-routers)# no bgp default ipv4-unicast

What is the default community for the command neighbor x.x.x.x send-community?

extended

extended community with two nex MP-BGP nontranstive attributes:

-MP_REACH_NLRI Multiprotocol Reachable NLRI announces new multiprotocol routes
-MP_UNREACH_NLRI Multiprocol Unreachbale NLRI serves to revoke the routes previously announced by MP_REACH_NLRI

What does mBGP/MP-BGP carry?

mBGP carries two sets of routes, one set for unicast routing and one set for multicast routing

Reference: http://www.cisco.com/c/en/us/tech/ip/multiprotocol-bgp-mbgp/index.html
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What is the command to upgrade to hierarchical BGP AFI syntax and difference between address-families?

bgp upgrade-cli  (default in IOS 15, command probably deprecated)

router bgp
bgp router-id 1.1.1.1
neighbor 7.7.7.7 remote-as 65215

address-family ipv4
neighbor 7.7.7.7 activate (activate address-family)

address-family ipv6
neighbor 7.7.7.7 activate

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