关于四层负载均衡的方案

[dean916]

在生产环境部署XQUIC，需要四层负载均衡（例如LVS）的兼容支持。
(例如：https://datatracker.ietf.org/doc/html/draft-duke-quic-load-balancers-06 ）
有推荐的做法吗？目前alibaba使用怎样的方案？

[Kulsk]

we follow the lb draft, the server will generate its own cid for lb, and the system defines the lb rule based on cid. whenever a quic packet is received, cid is used to dispatch this packet to its deatination.

[Lingtaonju]

Q1. Is there any details ?
Q2. Does the cid's format follow the quic lb draft ?
Q3. Does alibaba's Layer-4 LB has supported the QUIC-LB draft ?

[Kulsk]

1. as the server defined the length of it cid, when receiving a packet, server shall parse the cid first, as the draft specified, we used certain bytes in the cid as the key, to link this packet to a related process or RS.
2. yes.
3. I am not sure about the LB productions, LB is ever talked between several groups, maybe already supported.

[Kulsk]

server shall always choose its own cid following the lb draft when creating a connection.

[Lingtaonju]

Thanks for your reply.
For Question3, if the layer-4 lb has not supported the draft-quic-lb, how xquic supports address-migration and multiple-path when cid changes in the same session? So, is there a clear answer ?