--> Site of Origin is a BGP extended community used in multi-homed networks to prevent routing loops or sub optimal routing.
--> Site Of Origin can also be used in IGP as well as in BGP between PE & CE routers.
--> Site Of Origin uniquely identifies the routes that are originated from which customer site.
--> Site Of Origin is basically applied on PE interfaces so whenever the update comes from CE router to PE router then the PE router will simply insert SOO value to the update.
--> If the PE router receives the same update from different CE router on the interface where Site of Origin is configured, it discards the routing update.
--> IGP routing protocols such as EIGRP/OSPF has the capability to carry SOO in the update messages.
--> Site Of Origin can be configured in one of the following naming conventions
i) A 16-bit AS number, a colon, and a 32-bit number, example 100:1000
ii) A 32-bit IP address, a colon, and a 16-bit number, example 1.1.1.1:10
Md.Kareem
CCIE # 54759
--> Site Of Origin can also be used in IGP as well as in BGP between PE & CE routers.
--> Site Of Origin uniquely identifies the routes that are originated from which customer site.
--> Site Of Origin is basically applied on PE interfaces so whenever the update comes from CE router to PE router then the PE router will simply insert SOO value to the update.
--> If the PE router receives the same update from different CE router on the interface where Site of Origin is configured, it discards the routing update.
--> IGP routing protocols such as EIGRP/OSPF has the capability to carry SOO in the update messages.
--> Site Of Origin can be configured in one of the following naming conventions
i) A 16-bit AS number, a colon, and a 32-bit number, example 100:1000
ii) A 32-bit IP address, a colon, and a 16-bit number, example 1.1.1.1:10
Md.Kareem
CCIE # 54759
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