The ipv6 enable topology standard is configured in IS-IS protocol view. The meaning of this command is that Pv4 and IPv6 share the same topology.
Answer(s): A
When deploying BCPIMPLS TP VPN, the OSPF VPN route tag (VPN Route Tag) is not transmitted in the MP-BGP extended community attributes. It only makes sense on PE routers that receive MP-BGP routes and generate OSPF LSA.
Answer(s): B
In an MPLS network, SR running the DP protocol exchange LDP messages to realize functions such as neighbor discovery, session establishment and maintenance, and label management. In order to ensure the reliability of message delivery, all sending and receiving of LDP messages must be based on TCP connections.
Basic QinQ can select the outer tag encapsulation method according to the type of business.
The deployment of port isolation technology in Ethernet can realize Layer 2 intercommunication and Layer 3 isolation, making the network more flexible.
To ensure security, authentication can be configured in the OSPFv3 process area view.
BGP routing strategy can control the distribution and reception of routes.
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