With MX in ECMP, traffic from VM to BMS is getting routed
Bug #1464972 reported by
Praveen
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | ||
---|---|---|---|---|---|---|
Juniper Openstack | Status tracked in Trunk | |||||
R2.20 |
Fix Committed
|
High
|
Praveen | |||
Trunk |
Fix Committed
|
High
|
Praveen |
Bug Description
Scenario:
The setup has following configuration,
1. VN with subnet 1.1.1.0/24
2. There are 2 MX and both of them have 1.1.1.1/24 configured.
3. A VM with 1.1.1.2 pings to BMS with IP 1.1.1.5
4. ARP inside VM for 1.1.1.5 points to VRRP MAC instead of BMS MAC resulting in packet being routed
Problem:
1. Both MX export route for 1.1.1.0/24
2. On the compute node, 1.1.1.0/24 will be a ECMP route
3. When VM ARPs for 1.1.1.5, local vrouter will respond with VRRP MAC since its a ECMP route
Fix:
Force routes with IPAM Subnet to flood ARP even if its an ECMP route
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Review in progress for https:/ /review. opencontrail. org/11601
Submitter: Praveen K V (<email address hidden>)