Two BGP peers connected through a routed firewall are unable to establish a peering relationship. What could be the most likely cause？ （）
- A、 BGP peers must be Layer 2-adjacent
- B、 EBGP multihop is not configured
- C、 The firewall is not configured to allow IP protocol 89
- D、 The firewall is not configured to allow UDP 179.
正确答案:B
答案解析:有
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