Owner's Manual

Chapter 26. BGP | 701
NETGEAR 8800 User Manual
• <first two bytes of AS num>: This is the number represented by the first two bytes of a
four-byte AS number. The use of a private AS-number is not recommended.
• <last two bytes of AS num>: This is the number represented by the last two bytes of a
four-byte AS number. The use of a private AS-number is not recommended
Syntax in Set block
extended-community [set | add | delete] "<extended-community-1>
<extended-community-2> …."
extended-community remove
Where, the syntax of <extended-community-N> is the following:
[rt|soo]:[<2-byte AS num>:<4-byte num> | <4-byte IP Address>:<2-byte num>]
The attributes are defined as follows:
• set: Replaces the existing extended communities by the new ones as supplied in the
policy statement.
• add: Adds new extended communities to the existing extended community attribute. If an
extended community is already present, then policy will not add a duplicate extended
community to the route.
• delete: Deletes some of the extended communities from the extended community
attribute.
• remove: Removes extended community attribute from the route.
• rt: route target extended community type
• soo: site of origin extended community type
• <2-byte AS number>: This is 2-byte AS number. Use of private AS-number is not
recommended
• <4-byte num>: 4-byte unsigned number
• <4-byte IP address>: A valid host IP address. Network address is not accepted. Use of
private IP address is not recommended. Class-D IP address will be rejected.
Examples of Extended Communities
The following are examples of valid extended communities:
• rt:10.203.134.56:400
• soo:800:1600
• rt:14490:2345678
• soo:172.168.45.10:500
• rt:10.10:20000
• soo:1310740L:50000
The following are examples of invalid extended communities:
• rt:10.45.87.0:600: Invalid because the IP address is NOT a valid host IP address
• rt:239.1.1.1:400: Invalid because IP address belongs to class-D