[dualtor] Enhance IPinIP tunnel traffic distribution util. #3045
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The ptf script for checking IpinIP tunnel traffic balance is enhanced. The verification is spearated into two steps: Step 1. Verify traffic is not forwarded to server form standby ToR directly Strp 2. Verify traffic is distributed evenly among all T1s. Signed-off-by: bingwang <[email protected]>
Signed-off-by: bingwang <[email protected]>
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yxieca
reviewed
Feb 26, 2021
neethajohn
approved these changes
Feb 26, 2021
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Signed-off-by: bingwang [email protected]
Description of PR
Summary:
Fixes # (issue)
This PR is to enhance IPinIP tunnel traffic distribution util.
The verification is spearated into two steps:
Step 1. Verify traffic is not forwarded to server from standby ToR directly
Strp 2. Verify traffic is distributed evenly among all T1s.
Type of change
Approach
What is the motivation for this PR?
This PR is to enhance IPinIP tunnel traffic distribution util.
How did you do it?
Check the
ttlof packet captured in server(ptf).For packets arrived from
standby ToR->IPinIP tunnel->active ToR->server, thettlshould be decreaded by2;For packets arrived from
standby ToR->server(Negative scenario), thettlshould be decreaded by1.This feature is leveraged to verify packets are not forwarded from standby ToR to server directly.
How did you verify/test it?
Verified on dualtor testbed.
Any platform specific information?
No.
Supported testbed topology if it's a new test case?
dualtor testbed specific.
Documentation
No.