On 9/21/23 08:16, chuanyun Xiao via discuss wrote: > Hi: > In ovn 23.03.0, I run the "*ovn-nbctl --ecmp lr-route-add ROUTER PREFIX > NEXTHOP [PORT]*" command to add multiple routes with the same prefix but > different nexthop and port. Somebody tell me Specifies the maximum number > of ecmp routes supported for concurrent load? >
Hi, One can configure up to 64K ECMP routes (prefixes) with up to 64K paths each; from northd.c: /* Register for ECMP bucket selection. */ #define REG_ECMP_GROUP_ID "reg8[0..15]" #define REG_ECMP_MEMBER_ID "reg8[16..31]" I'm quite sure though that 64K paths for a route is not that reasonable though. Each ECMP prefix translates to an openflow group and each path is a bucket in that group. AFAICT the number of buckets in a group is not limited by the OpenFlow standard but it is essentially limited to the max size of a struct ofpbuf (i.e., 64K) divided by size-of-a-single-bucket. Regards, Dumitru _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
