179 portu BGP komşulukları için kullanılır.
The device BGP4 route table can have multiple routes or paths to the same destination, which are learned from different BGP4 neighbors. A BGP4 neighbor is another device that also is running BGP4. BGP4 neighbors communicate using Transmission Control Protocol (TCP) port 179 for BGP4 communication. When you configure the device for BGP4, one of the configuration tasks you perform is to identify the device’s BGP4 neighbors