[NETVIRT-1441] vpn basic ipv6 ping tests fail Created: 01/Oct/18  Updated: 10/Oct/18  Resolved: 10/Oct/18

Status: Resolved
Project: netvirt
Component/s: vpnmanager
Affects Version/s: None
Fix Version/s: Neon

Type: Bug Priority: Medium
Reporter: Sam Hague Assignee: Karthikeyan Krishnan
Resolution: Done Votes: 0
Labels: csit:failures
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: File odl1_karaf.neon.302.log.tar.xz    
Issue Links:
Relates
relates to OPNFLWPLUG-1038 forwardingrules-manager: Flow add wit... Resolved

 Description   

https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-neon/302/odl_1/odl1_karaf.log.gz, also job 305, 306, 308 (for arp learning suite)

The following two tests fail with the ping error below. The tests fail randomly every few days or so.

vpn basic ipv6.Delete And Recreate Extra
vpn basic ipv6.Add Multiple Extra Routes And Check Datapath Before L3VPN Creation

'PING 2001:db9:cafe:d::10 (2001:db9:cafe:d::10): 56 data bytes --- 2001:db9:cafe:d::10 ping statistics --- 3 packets transmitted, 0 packets received, 100% packet loss $' does not contain '64 bytes'

 Comments   
Comment by Karthikeyan Krishnan [ 10/Oct/18 ]

Initial Analysis:

Extra route V6 traffic is not working because of absence of one of the V6 extra route entry in FIB table

 

Controller Node-1 (ECMP group 150066 is missing here)
==================
group_id=150070,type=select,bucket=actions=set_field:0x42b->tun_id,set_field:fa:16:3e:35:29:9c->eth_dst,load:0x200->NXM_NX_REG6[],resubmit(,220)
group_id=150072,type=select,bucket=actions=set_field:0x42b->tun_id,set_field:fa:16:3e:35:29:9c->eth_dst,load:0x200->NXM_NX_REG6[],resubmit(,220)

Extra route (2001:db9:cafe:d::/64) flow entry is missing in FIB table

cookie=0x8000003, duration=30.210s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30e0a/0xfffffe,ipv6_dst=2001:db9:abcd:d::/64 actions=group:150072

 

Compute Node -1 (ECMP group 150066 is proper and this compute VM extra route traffic is working fine)
================
group_id=150072,type=select,bucket=actions=group:150066
group_id=150070,type=select,bucket=actions=group:150066
group_id=150066,type=all,bucket=actions=set_field:fe:16:3e:35:29:9c->eth_src,set_field:fa:16:3e:35:29:9c->eth_dst,load:0xb200->NXM_NX_REG6[],resubmit(,220)

Both the extra route flows are appearing on FIB entry

cookie=0x8000003, duration=31.399s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30e0a/0xfffffe,ipv6_dst=2001:db9:cafe:d::/64 actions=group:150070 cookie=0x8000003, duration=31.380s, table=21, n_packets=0, n_bytes=0, priority=74,ipv6,metadata=0x30e0a/0xfffffe,ipv6_dst=2001:db9:abcd:d::/64 actions=group:150072

 

Compute Node-2 (ECMP group 150066 is missing here)
==============
group_id=150070,type=select,bucket=actions=set_field:0x42b->tun_id,set_field:fa:16:3e:35:29:9c->eth_dst,load:0x500->NXM_NX_REG6[],resubmit(,220)
group_id=150072,type=select,bucket=actions=set_field:0x42b->tun_id,set_field:fa:16:3e:35:29:9c->eth_dst,load:0x500->NXM_NX_REG6[],resubmit(,220)

 

Extra route (2001:db9:cafe:d::/64) flow entry is missing in FIB table

cookie=0x8000003, duration=33.972s, table=21, n_packets=6, n_bytes=708, priority=74,ipv6,metadata=0x30e0a/0xfffffe,ipv6_dst=2001:db9:abcd:d::/64 actions=group:150072

 

Comment by Karthikeyan Krishnan [ 10/Oct/18 ]

This is fixed in fluorine and neon release as part of  ECMP issue(ECMP flow groups are existed before pushing flows) fix and please refer the below gerrit link details.

Neon:

https://git.opendaylight.org/gerrit/#/c/76628/

Fluorine:

https://git.opendaylight.org/gerrit/#/c/76629/

 

Note: These fix got merged into neon branch on Oct-04-2018. After that, we are not seeing this extra route v6 ping issue in "vpn basic ipv6" suite. Hence closing this issue.

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