ECMP logic should compare AS path length
Bug #1582452 reported by
vivekananda shenoy
This bug affects 2 people
| Affects | Status | Importance | Assigned to | Milestone | ||
|---|---|---|---|---|---|---|
| Juniper Openstack | Status tracked in Trunk | |||||
| R3.0 |
Fix Committed
|
High
|
Nischal Sheth | |||
| Trunk |
Fix Committed
|
High
|
Nischal Sheth | |||
Bug Description
Version 3.0.2.0 build 25
If CN receives multiple BGP path for the same IP prefix from another Contrail controller or from the MX the bgp best path check is done by comparing local-preference and in case if one of the path has shorter AS-PATH length compared to the other one both are treated equal.
VES topo is attached. Cluster1 is getting 3 paths for IP address of a VM in cluster 2 and all 3 paths are installed in the agent routing table although the direct EBGP path from cluster 2 has AS-PATH-LEN of 1. This is creating issues w.r.t ARP resolution for the IP address of VM in cluster 2, as the ARP is getting resolved to vhost0 MAC address of the compute node in cluster 2. I am opening a separate PR for that.
| description: | updated |
| Changed in juniperopenstack: | |
| importance: | Undecided → High |
| assignee: | nobody → Nischal Sheth (nsheth) |
| summary: |
- 3.0 Controller : There has to be check against the AS path length when - comparing ECMP routes in the case of federated clusters + ECMP logic should compare AS path length in case of federated clusters |
| summary: |
- ECMP logic should compare AS path length in case of federated clusters + ECMP logic should compare AS path length |
| description: | updated |
| tags: | added: contrail-control |
| tags: | added: blocker |
| information type: | Proprietary → Public |
| tags: | removed: blocker |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote [Review update] master | #2 |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote [Review update] R3.0 | #4 |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote A change has been merged | #6 |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote | #7 |
To post a comment you must log in.
Review in progress for https:/
Submitter: Nischal Sheth (<email address hidden>)