Bug 1359951
Summary: | Poor L3 network performance | ||
---|---|---|---|
Product: | Red Hat OpenStack | Reporter: | Jeremy Eder <jeder> |
Component: | openstack-neutron | Assignee: | Ihar Hrachyshka <ihrachys> |
Status: | CLOSED DUPLICATE | QA Contact: | Toni Freger <tfreger> |
Severity: | high | Docs Contact: | |
Priority: | high | ||
Version: | 8.0 (Liberty) | CC: | amuller, chrisw, ihrachys, jtaleric, nyechiel, srevivo |
Target Milestone: | --- | Keywords: | ZStream |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | If docs needed, set a value | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2016-12-21 14:14:04 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Jeremy Eder
2016-07-25 23:41:16 UTC
Within the active qrouter namespace: [root@overcloud-controller-1 heat-admin]# ip netns exec qrouter-f125cf47-0e27-448a-9943-02df272fbae9 ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 85: ha-4e072f10-80: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether fa:16:3e:7f:00:43 brd ff:ff:ff:ff:ff:ff inet 169.254.192.2/18 brd 169.254.255.255 scope global ha-4e072f10-80 valid_lft forever preferred_lft forever inet 169.254.0.1/24 scope global ha-4e072f10-80 valid_lft forever preferred_lft forever inet6 fe80::f816:3eff:fe7f:43/64 scope link valid_lft forever preferred_lft forever 86: qr-095135b6-ba: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN link/ether fa:16:3e:39:15:09 brd ff:ff:ff:ff:ff:ff inet 192.0.0.1/24 scope global qr-095135b6-ba valid_lft forever preferred_lft forever inet6 fe80::f816:3eff:fe39:1509/64 scope link valid_lft forever preferred_lft forever 88: qg-d08ed9a2-24: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN link/ether fa:16:3e:5f:f8:81 brd ff:ff:ff:ff:ff:ff inet 10.2.4.23/21 scope global qg-d08ed9a2-24 valid_lft forever preferred_lft forever inet 10.2.4.24/32 scope global qg-d08ed9a2-24 valid_lft forever preferred_lft forever inet6 fe80::f816:3eff:fe5f:f881/64 scope link valid_lft forever preferred_lft forever The guest veths: 48: qvo9bfe2904-d9@qvb9bfe2904-d9: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP qlen 1000 link/ether 82:87:08:78:6a:b6 brd ff:ff:ff:ff:ff:ff inet6 fe80::8087:8ff:fe78:6ab6/64 scope link valid_lft forever preferred_lft forever 49: qvb9bfe2904-d9@qvo9bfe2904-d9: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbr9bfe2904-d9 state UP qlen 1000 link/ether 12:9e:b7:5c:54:fe brd ff:ff:ff:ff:ff:ff inet6 fe80::109e:b7ff:fe5c:54fe/64 scope link valid_lft forever preferred_lft forever 50: tap9bfe2904-d9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbr9bfe2904-d9 state UNKNOWN qlen 500 link/ether fe:16:3e:4c:5d:c7 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc16:3eff:fe4c:5dc7/64 scope link valid_lft forever preferred_lft forever The guest MTU: root@rook: ~ # ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc pfifo_fast state UP qlen 1000 link/ether fa:16:3e:4c:5d:c7 brd ff:ff:ff:ff:ff:ff inet 192.0.0.5/24 brd 192.0.0.255 scope global dynamic eth0 valid_lft 70762sec preferred_lft 70762sec inet6 fe80::f816:3eff:fe4c:5dc7/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN link/ether 02:42:b3:aa:6a:2d brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 scope global docker0 valid_lft forever preferred_lft forever Neutron network: stack@ospd: ~ $ neutron net-show rook-test +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | admin_state_up | True | | id | 484c33ea-e3a6-412d-81ca-552578b06069 | | mtu | 1450 | | name | rook-test | | port_security_enabled | True | | provider:network_type | vxlan | | provider:physical_network | | | provider:segmentation_id | 74 | | qos_policy_id | | | router:external | False | | shared | False | | status | ACTIVE | | subnets | 72d58739-c4b1-4ae7-b656-69f28eabb2bb | | tenant_id | b5539cf98ca34a3c8071dd3da384351c | +---------------------------+--------------------------------------+ External network: stack@ospd: ~ $ neutron net-show public +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | admin_state_up | True | | id | 158ff937-8559-4171-8bfa-6a88250d2a58 | | mtu | 1500 | | name | public | | port_security_enabled | True | | provider:network_type | vlan | | provider:physical_network | datacentre | | provider:segmentation_id | 7 | | qos_policy_id | | | router:external | True | | shared | False | | status | ACTIVE | | subnets | 53f70ea1-17e9-4103-8f9b-cf542d336993 | | tenant_id | b5539cf98ca34a3c8071dd3da384351c | +---------------------------+--------------------------------------+ So as far as I see, neutron-server calculated MTU = 1500 for the external network, but then it still got qg (external gateway) interface of the router to use 1450 instead of 1500. That may be the problem, because other counterparts on the external network assume that the router will be able to process 1500-sized frames, and it probably just drops them. I think it may be a duplicate of bug 1348116. Please validate if a later (7.2.0+) build fixes the issue for you. I am closing the bug as a duplicate. Feel free to reopen if you still hit the issue. Also, if you do, please attach neutron logs and all config files (/etc/neutron/...) *** This bug has been marked as a duplicate of bug 1348116 *** |