CFM: BMS on a VN with multiple subnets not supported

Bug #1803465 reported by manishkn
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Juniper Openstack
Status tracked in Trunk
R5.0
Won't Fix
High
Unassigned
Trunk
New
Critical
Atul Moghe

Bug Description

VN1 (subnet1 40.1.1.0/24 and subnet2 30.1.1.0/24)
Expectation is once subnet1 is exhausted, use subnet 2 for same VN

This works for VM's

But when it comes to BMS, and bms in subnet1 want to talk to subnet2 (within same VN) , this needs a gateway to be configured on spine and this is failing to configure the g/w for subnet1 and subnet2 on spine

This is a must fix for 5.1 and release-note in 5.0.2

set groups __contrail_overlay_evpn_gateway__ interfaces irb unit 10 family inet
address 30.1.1.4/24 virtual-gateway-address 40.1.1.1
set groups __contrail_overlay_evpn_gateway__ interfaces irb unit 10 family inet
address 40.1.1.3/24 virtual-gateway-address 40.1.1.1

>>>>this is the config push on spine.....40.1.1.1 is the gateway for both subnet which is wrong.

manishkn (manishkn)
description: updated
manishkn (manishkn)
description: updated
Revision history for this message
Jeba Paulaiyan (jebap) wrote :

Notes:

When BMS are connected across different subnets that are part of same VN, the required gateway configuration is not pushed to the Spine by the device manager. To get the traffic flow between the BMS in such scenario, the workaround is to configure static ARP on the BMS.

Jeba Paulaiyan (jebap)
information type: Proprietary → Public
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