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lab:
port channel: channel port is two lines, direct mode active will report an error, because e0/0 is pre-set desirable, have to no first.
BGP: address-family ipv4
COPP: question 1 change to ospf (dump is EIGRP) and ICMP change to telnet.
OSFP: router ospf, which is an aggregation route
vrf tunnel: only the value changes, SW11 ping SW22 fail, reason is SW22 does not have the route to back
Enable Flexible NetFlow: only values change
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