问答题
why do you configure GRE in IPV6？
（1）use GRE tunnels to carry ipv6&en......
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问答题 whenyouuseLSAtype4inOSPFenvironment？
问答题 hyyouuseSpanning-tree？DifferencebetweenPVST&MST.
问答题 whatisthedifferencebetweentheHSRPandVRRP？
