Test environment: Ryu-4.13, OpenvSwitch-2.4.1
Topology:
/ s2 \ h1--s1 ----| |---- s4--h2
\ s3 /
To prevent from link s3-s4 being down, one Fast-Failover Group g1 was added
into s3. Group g1 consists of two buckets, the first bucket was used toforward
packets to s3-s4 when link s3-s4 is normal, while the second bucket was used to
forward packets to s3-s1 when link s3-s4 is down.
Experiment: hit down command `h1 ping h2`, everything is normal when link
s3-s4 is up. Then tear it down, the ping command won't work. In this situation,
the port in the secondbucket is the in-port of the ping pakcet, but group g1
didn't forward packets to the port in second bucket, i.e. in-port of ping
packets.
Verification: this time, I add another link to the above topology.
/ s2 \ h1--s1 ----| |---- s4--h2
\ s3 / \ s5 /Then, the second
bucket was changed to forward packets to s5-s4 when link s3-s4 was down. Repeat
the above experiment, everything is ok when link s3-s4 is down, and the
groupindeed had forward packets to the s5-s4.
Question: Is this "feature" a bug of Ryu-4.13 or OpenvSwitch-2.4.1 ?
Any experience sharing or suggestions would be great.Thanks.
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