2024年8月23日 · After 202012 branch, default eBGP requests the route-map defined with RFC-8212 compliance. If user don't define the route-map, please disable "ebgp-requires-policy". Otherwise, BGP PfxRcd (Prefix Received) / PfxSnt (Prefix Sent) are restriction by the route-map policy. (i.e no no routes will be accepted and announced) Example.

Configure an AS and an eBGP neighbor. In a similar fashion, a user can configure eBGP session in SONiC. In FRR, eBGP sessions need to have filters for incoming and outgoing routes in accordance with RFC 8212 or the no bgp ebgp-requires-policy flag needs to be explicitly set. An example of setting up an eBGP session using second method:

2023年12月25日 · Equal Cost Multi Path (ECMP) is a Layer 3 routing strategy to forward traffic to a destination using multiple available paths. ECMP increases the number of paths to a destination and increases the available bandwidth to reach the destination. The ECMP mechanism enables load balancing and increased bandwidth by using unused links and bandwidth.

bfd 可快速检测内部 bgp (ibgp) 和外部 bgp (ebgp) 对等方之间 bgp 快速转发路径中的通信故障。 BFD for BGP 在物理、端口通道和 VLAN 接口上受支持。 BFD for BGP 确实支持 BGP 多级跳功能。

在 SONiC 中，默认情况下，我们对 ECMP 和 LAG 使用不同的哈希算法，因此需要配置哈希种子。 虽然 ECMP 可以增加可用链路的数量，但所有可用路径都应紧密共享，以便没有路径过度或未充分利用。 您可以修改 IP ECMP 负载共享哈希参数，以影响跨多个可用路径的流量负载共享。 要获得最佳 ECMP 负载共享，请在位于源和目标之间的所有设备中配置 ECMP。 最佳做法是在每个层上根据网络中的独特流量模式（如果需要）配置不同的负载平衡参数。

2024年3月27日 · In single-asic device, SONiC uses Loopback0 IPv4 address as BGP router id. In mult-asic and uses Loopback4096 IPv4 address as BGP router id (for both iBGP and eBGP). This coupling prevents users from using customized router id.

Netberg updates its Netberg SONiC distribution to release 2022.11 on Aurora 610, Aurora 710, and Aurora 750 P4-Programmable Intel Tofino IFP systems. Netberg launches Aurora 810 platform for next-generation networks

2024年8月23日 · In order to make BGP unnumbered work, it indeed needs a router interface on it, so we let user to configure extra IP on it as a workaround. The version 202006 and 202012, the Ethernet interface didn't require the additional setting for BGP unnumbered.

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When the firewall has an external neighbor that does not have a direct connection, you can use the ebgp−multihop command to establish a neighbor connection. To configure EBGP Multihop, configure routers R1 and R2 as follows: