两台SR8812-X堆叠，作为用户网关，上下行均为跨框聚合口互联
SR8812-X作为BRAS对接入用户进行IPOE WEB认证，服务器对认证用户下发100M限速，测试时发现用户认证后测速上行能限速到100M，但是下行流量会到150M-200M，限速没有生效
先查看上行聚合4和下行聚合5状态正常
Aggregate Interface: Route-Aggregation4
Aggregation Mode: Static
Loadsharing Type: Shar
Port Status Priority Oper-Key Role
HGE1/1/1/1 S 32768 5 None
HGE2/1/1/1 S 32768 5 None
Aggregate Interface: Route-Aggregation5
Aggregation Mode: Static
Loadsharing Type: Shar
Port Status Priority Oper-Key Role
HGE1/1/2/1 S 32768 6 None
HGE2/1/2/1 S 32768 6 None
查看接入用户的限速下发正常
dis access-user mac-address H-H-H v
ACL&QoS:
Inbound user profile: N/A
Outbound user profile: N/A
Session group profile: N/A
User group ACL: csu (active)
Inbound CAR: CIR 104857 kbps PIR 104857 kbps CBS - bytes (active)
Outbound CAR: CIR 104857 kbps PIR 104857 kbps CBS - bytes (active)
Inbound user priority: -
Outbound user priority: -
*Sep XX 09:41:49:244 2024 H3C RADIUS/7/PACKET: -MDC=1;
User-Name="XX"
H3c-Input-Average-Rate=104857000
H3c-Input-Peak-Rate=104857000
H3c-Output-Average-Rate=104857000
H3c-Output-Peak-Rate=104857000
由于现场是跨框堆叠的场景，设备默认是本框优先，下行流量会在两个框选择出口，而不是以一个接口转发，会导致下行转发流量是限速值*聚合接口数，即100M*2 = 200M
可以通过去使能本地优先转发（undo link-aggregation load-sharing mode local-first），让BRAS流量只走一个出口，此时下行流量就是配置的限速值了
去使能本地转发优先，undo link-aggregation load-sharing mode local-first