how many neighbor commands required for establish ibgp peers in 4 routers？
正确答案:
If using IBGP full-mesh to establish IBGP peer and no update-source is specified， 12 neighbor command is need.
If RR is used，it could be 8 command using for ibgp establishing when there are 1 RR，2 client and 1 nonclient and no update-source is specified.
If RR is used，it could be 8 command using for ibgp establishing when there are 1 RR，2 client and 1 nonclient and no update-source is specified.
答案解析:有
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