Systems and methods for subscription based selective EVPN route distribution
In one embodiment, a method includes receiving, by a route reflector, a subscription request from a first provider edge node in a network and generating a subscription policy for the first provider edge node. The method also includes receiving a first Ethernet Virtual Private Network (EVPN) Type 2 Route from a second provider edge node, assigning a sequence number to the first EVPN Type 2 Route, and communicating the first EVPN Type 2 Route with the sequence number to the first provider edge node. The method further includes receiving a second EVPN Type 2 Route from a third provider edge node, generating an updated sequence number in response to receiving the second EVPN Type 2 Route from the third provider edge node, and communicating the second EVPN Type 2 Route with the updated sequence number to the first provider edge node and the second provider node.
1. A route reflector, comprising:
one or more processors; and
one or more computer-readable non-transitory storage media coupled to the one or more processors and comprising instructions that, when executed by the one or more processors, cause the route reflector to perform operations comprising:
receiving a subscription request from a first provider edge node in a network;
generating a subscription policy for the first provider edge node;
receiving a first Ethernet Virtual Private Network (EVPN) Type 2 Route from a second provider edge node in the network, wherein the first EVPN Type 2 Route comprises at least one address of a customer edge node;
assigning a sequence number to the first EVPN Type 2 Route;
communicating the first EVPN Type 2 Route with the sequence number to the first provider edge node;
receiving a second EVPN Type 2 Route from a third provider edge node, wherein the second EVPN Type 2 Route comprises the at least one address of the customer edge node;
generating an updated sequence number in response to receiving the second EVPN Type 2 Route from the third provider edge node; and
communicating the second EVPN Type 2 Route with the updated sequence number to the first provider edge node and the second provider node.
2. The route reflector of claim 1 , wherein:
the customer edge node is locally attached to the second provider edge node when the route reflector receives the first EVPN Type 2 Route from the second provider node; and
the customer edge node is locally attached to the third provider edge node when the route reflector receives the second EVPN Type 2 Route from the third provider node.
3. The route reflector of claim 1 , wherein:
the subscription request comprises an outbound route filter (ORF);
the ORF comprises an Address Family Identifier (AFI)/Subsequent Address Family Identifier (SAFI) component; and
the AFI/SAFI component is set to EVPN.
4. The route reflector of claim 3 , wherein:
the ORF defines a Route Type 2 ORF type as a sub-type-length-value (sub-TLV); and
the sub-TLV indicates one of the following Route Type 2 subscription types:
Media Access Control (MAC) only;
Internet Protocol version 4 (IPv4) only;
IP version 6 (IPv6) only;
MAC+IPv4; or
MAC+IPv6.
5. The route reflector of claim 1 , wherein the route reflector generates the subscription policy in accordance with one of the following subscription implementation options:
an exact match subscription database (DB) per user group (UG);
a subscription bitmask per Route Type 2; or
a Transmit List (TXLIST) per UG.
6. The route reflector of claim 1 , wherein:
the first provider edge node is a border provider edge node; and
the customer edge node is a host; and
the at least one address of the customer edge node comprises at least one of a MAC address and an IP address.
7. The route reflector of claim 1 , wherein the network is an EVPN Integrated Routing and Bridging (IRB) network.
8. A method, comprising:
receiving, by a route reflector, a subscription request from a first provider edge node in a network;
generating, by the route reflector, a subscription policy for the first provider edge node;
receiving, by the route reflector, a first Ethernet Virtual Private Network (EVPN) Type 2 Route from a second provider edge node in the network, wherein the first EVPN Type 2 Route comprises at least one address of a customer edge node;
assigning, by the route reflector, a sequence number to the first EVPN Type 2 Route;
communicating, by the route reflector, the first EVPN Type 2 Route with the sequence number to the first provider edge node;
receiving, by the route reflector, a second EVPN Type 2 Route from a third provider edge node, wherein the second EVPN Type 2 Route comprises the at least one address of the customer edge node;
generating, by the route reflector, an updated sequence number in response to receiving the second EVPN Type 2 Route from the third provider edge node; and
communicating, by the route reflector, the second EVPN Type 2 Route with the updated sequence number to the first provider edge node and the second provider node.
9. The method of claim 8 , wherein:
the customer edge node is locally attached to the second provider edge node when the route reflector receives the first EVPN Type 2 Route from the second provider node; and
the customer edge node is locally attached to the third provider edge node when the route reflector receives the second EVPN Type 2 Route from the third provider node.
10. The method of claim 8 , wherein:
the subscription request comprises an outbound route filter (ORF);
the ORF comprises an Address Family Identifier (AFI)/Subsequent Address Family Identifier (SAFI) component; and
the AFI/SAFI component is set to EVPN.
11. The method of claim 10 , wherein:
the ORF defines a Route Type 2 ORF type as a sub-type-length-value (sub-TLV); and
the sub-TLV indicates one of the following Route Type 2 subscription types:
Media Access Control (MAC) only;
Internet Protocol version 4 (IPv4) only;
Internet Protocol version 6 (IPv6) only;
MAC+IPv4; or
MAC+IPv6.
12. The method of claim 8 , wherein the route reflector generates the subscription policy in accordance with one of the following subscription implementation options:
an exact match subscription database (DB) per user group (UG);
a subscription bitmask per Route Type 2; and
a Transmit List (TXLIST) per UG.
13. The method of claim 8 , wherein:
the first provider edge node is a border provider edge node; and
the customer edge node is a host; and
the at least one address of the customer edge node comprises at least one of a MAC address and an IP address.
14. The method of claim 8 , wherein the network is an EVPN Integrated Routing and Bridging (IRB) network.
15. One or more computer-readable non-transitory storage media embodying instructions that, when executed by a processor, cause the processor to perform operations comprising:
receiving a subscription request from a first provider edge node in a network;
generating a subscription policy for the first provider edge node;
receiving a first Ethernet Virtual Private Network (EVPN) Type 2 Route from a second provider edge node in the network, wherein the first EVPN Type 2 Route comprises at least one address of a customer edge node;
assigning a sequence number to the first EVPN Type 2 Route;
communicating the first EVPN Type 2 Route with the sequence number to the first provider edge node;
receiving a second EVPN Type 2 Route from a third provider edge node, wherein the second EVPN Type 2 Route comprises the at least one address of the customer edge node;
generating an updated sequence number in response to receiving the second EVPN Type 2 Route from the third provider edge node; and
communicating the second EVPN Type 2 Route with the updated sequence number to the first provider edge node and the second provider node.
16. The one or more computer-readable non-transitory storage media of claim 15 , wherein:
the customer edge node is locally attached to the second provider edge node when the first EVPN Type 2 Route is received from the second provider node; and
the customer edge node is locally attached to the third provider edge node when the second EVPN Type 2 Route is received from the third provider node.
17. The one or more computer-readable non-transitory storage media of claim 15 , wherein:
the subscription request comprises an outbound route filter (ORF);
the ORF comprises an Address Family Identifier (AFI)/Subsequent Address Family Identifier (SAFI) component; and
the AFI/SAFI component is set to EVPN.
18. The one or more computer-readable non-transitory storage media of claim 17 , wherein:
the ORF defines a Route Type 2 ORF type as a sub-type-length-value (sub-TLV); and
the sub-TLV indicates one of the following Route Type 2 subscription types:
Media Access Control (MAC) only;
Internet Protocol version 4 (IPv4) only;
IP version 6 (IPv6) only;
MAC+IPv4; or
MAC+IPv6.
19. The one or more computer-readable non-transitory storage media of claim 15 , wherein the subscription policy is generated in accordance with one of the following subscription implementation options:
an exact match subscription database (DB) per user group (UG);
a subscription bitmask per Route Type 2; or
a Transmit List (TXLIST) per UG.
20. The one or more computer-readable non-transitory storage media of claim 15 , wherein:
the first provider edge node is a border provider edge node; and
the customer edge node is a host; and
the at least one address of the customer edge node comprises at least one of a MAC address and an IP address.