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ME60 V800R010C10SPC500 Feature Description - WAN Access 01

This is ME60 V800R010C10SPC500 Feature Description - WAN Access
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BGP Dynamic Update Peer-Groups

BGP Dynamic Update Peer-Groups

As the routing table increases in size and the network topology increases in complexity, BGP needs to be able to support more peers. When the ME device needs to send a large number of routes to many BGP peers and most of the peers share the same configuration, if the ME device groups each route and then send the route to each peer, the efficiency is low.

The dynamic update peer-groups feature can address this problem. It considers all the BGP peers with the same configuration as an update-group. With the dynamic update peer-groups feature, each route to be sent is grouped once for all and then sent to all peers in the update-group, improving grouping efficiency and forwarding performance exponentially.

Usage Scenario

The BGP dynamic update peer-groups feature is applicable to the following scenarios:

  • Scenario with an international gateway

  • Scenario with an RR

  • Scenario where routes received from EBGP peers need to be sent to all IBGP peers

Figure 9-31 Networking for the international gateway

Figure 9-32 Networking for RRs with many clients

Figure 9-33 Networking for a PE connected to multiple IBGP peers

The preceding scenarios have in common that a router needs to send routes to a large number of BGP peers, most of which share the same configuration. This situation is most evident in the networking shown in Figure 9-32.

For example, an RR has 100 clients and needs to reflect 100,000 routes to them. If the RR groups the routes for each peer before sending the routes to 100 clients, the total number of times that all routes are grouped is 100,000 x 100. After the dynamic update peer-groups feature is applied, the total number of times that all routes are grouped changes to 100,000 x 1. The efficiency is 100 times higher than before.

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Updated: 2019-01-04

Document ID: EDOC1100059473

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