System and method for adding routing paths in a network
Aspects of the present disclosure involve systems, methods, computer program products, and the like, for generating a routing table. In one implementation, BGP route broadcasts are received by a control plane of a network. The BGP route broadcasts are aggregated into a table of address summarized routes based on IP addresses included in the BGP route broadcasts. A table of attribute summarized routes is generated from the table of address summarized routes based on similarities between attributes included in the address summarized routes.
1. A method for generating a routing table, the method comprising:
receiving a plurality of routing information broadcasts, the routing information broadcasts comprising an Internet Protocol (IP) address, a mask value, and metadata;
generating an address summarized table by comparing IP addresses and mask values between the multiple routing information broadcasts, the address summarized table comprising contiguous IP address and corresponding mask values; and
generating an attribute summarized table by comparing metadata between address summarized table entries, the attribute summarized table comprising address summarized table entries having identical portions of metadata.
2. The method of claim 1 , wherein the metadata comprises one of a local preference, an autonomous system (AS) path length, an AS path, or a multiple exit discriminator (MED).
3. The method of claim 1 , further comprising forwarding a packet through a network based on the attribute summarized table.
4. The method of claim 1 , wherein generating the attribute summarized table further comprises comparing a respective metadata value of each address summarized table entry and grouping entries having identical metadata values.
5. The method of claim 4 , wherein the routing information broadcasts comprises one or more border gateway protocol (BGP) broadcasts received by one or more route reflectors comprising a data plane for a network.
6. The method of claim 1 , wherein a route reflector receives the routing information broadcasts, and further comprising storing the attribute summarized table on a router.
7. The method of claim 6 , wherein multiple routers store respective copies of the attribute summarized table, each respective copy of the attribute summarized table including interface identifiers for forwarding packets across a network.
8. The method of claim 1 , wherein entries of the attribute summarized table each comprise a summarized address entry associated with a respective interface for forwarding packets.
9. A system for generating a routing table, the system comprising:
one or more processors; and
a memory storing instructions to:
receive a plurality of routing information broadcasts, the routing information broadcasts comprising an Internet Protocol (IP) address, a mask value, and metadata;
generate an address summarized table by comparing IP addresses and mask values between the multiple routing information broadcasts, the address summarized table comprising contiguous IP address and corresponding mask values; and
generate an attribute summarized table by comparing metadata between address summarized table entries, the attribute summarized table comprising address summarized table entries having identical portions of metadata.
10. The system of claim 9 , wherein the metadata comprises one of a local preference, an autonomous system (AS) path length, an AS path, or a multiple exit discriminator (MED).
11. The system of claim 9 , wherein the memory stores further instructions to forward a packet based through a network on the attribute summarized table.
12. The system of claim 9 , wherein the routing information broadcasts comprises one or more border gateway protocol (BGP) broadcasts that are received by one or more route reflectors comprising a data plane for a network.
13. The system of claim 9 , wherein entries of the attribute summarized table each comprise a summarized address entry associated with a respective interface for forwarding packets.
14. The system of claim 9 , wherein a route reflector receives the routing information broadcasts, and the memory stores further instructions to store the attribute summarized table on a router.
15. The method of claim 14 , wherein multiple routers store respective copies of the attribute summarized table, each respective copy of the attribute summarized table including interface identifiers for forwarding packets across a network.
16. A method for generating a routing table, the method comprising:
receiving multiple routing information broadcasts, the routing information broadcasts comprising an Internet Protocol (IP) address, a mask value, and metadata;
performing bitwise AND operations between respective IP addresses and a series of bits based on the mask values to identify identical IP address portions between IP addresses;
identifying contiguous IP addresses from the IP addresses including identical address portions based on a rightmost bit for each respective IP address including identical address portions;
generating an address summarized table by aggregating the contiguous IP addresses into respective single address summarized entries, the address summarized table comprising address summarized IP addresses, respective mask values, and respective metadata;
comparing attributes of the address summarized IP addresses to identify address summarized IP addresses associated with respective metadata having identical portions with each other; and
generating an attribute summarized table by aggregating the identified address summarized IP addresses into single attribute summarized entries, the attribute summarized table comprising attribute summarized IP addresses, respective mask values and a respective portion of the respective metadata.
17. The method of claim 16 , wherein the metadata comprises one of a local preference, an autonomous system (AS) path length, an AS path, or a multiple exit discriminator (MED).
18. The method of claim 16 , wherein at least one of the address summarized table or the attribute summarized tables includes respective interface values associated with each table entry, the interface values indicating a forwarding interface for routing packets across a network.
19. The method of claim 18 , further comprising forwarding a packet based through the network based on the interface values of the attribute summarized table.
20. The method of claim 18 , wherein a route reflector receives the routing information broadcasts, the method further comprising storing the attribute summarized table on a router.