[action] [PR:9117] [dualtor] Disable running icmp_responder at session-level#9120
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mssonicbld merged 1 commit intosonic-net:202205from Jul 26, 2023
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…t#9117) Approach What is the motivation for this PR? Disable running icmp_responder at session level. The reason is that enabling icmp_responder at the session level could cause some T0 testcase failures as the ICMP replies pollute the FDB table. For example: Port Ethernet4, mux server IP 192.168.0.2, connected to ptf port eth1 that has mac A. Port Ethernet40, connected to ptf port eth10 that has mac B. Some T0 testcases configure 192.168.0.2 IP on ptf port eth10, DUTs will learn the arp as 192.168.0.2 with mac B on port Ethernet40. After linkmgrd learns the arp, it will send heartbeats to 192.168.0.2 with dest mac as B on Ethernet4. As the icmp_responder is running, DUT will receive heartbeat replies with source IP 192.168.0.2 and source mac B on Ethernet4. So DUT will learn mac B on Ethernet4, the arp entry of 192.168.0.2 will be: mac B on port Ethernet40. In this case, the following I/O verification will fail. Signed-off-by: Longxiang Lyu lolv@microsoft.com How did you do it? How did you verify/test it?
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Original PR: #9117 |
lolyu
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Jul 26, 2023
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Description of PR
Summary:
Fixes # (issue)
Type of change
Back port request
Approach
What is the motivation for this PR?
Disable running
icmp_responderat session level.The reason is that enabling
icmp_responderat the session level could cause some T0 testcase failures as the ICMP replies pollute the FDB table.For example:
Port
Ethernet4, mux server IP192.168.0.2, connected to ptf porteth1that has macA.Port
Ethernet40, connected to ptf porteth10that has macB.Some T0 testcases configure
192.168.0.2IP on ptf porteth10, DUTs will learn the arp as192.168.0.2with macBon portEthernet40. After linkmgrd learns the arp, it will send heartbeats to192.168.0.2with dest mac asBonEthernet4. As theicmp_responderis running, DUT will receive heartbeat replies with source IP192.168.0.2and source macBonEthernet4.So DUT will learn mac
BonEthernet4, the arp entry of192.168.0.2will be: macBon portEthernet40.In this case, the following I/O verification will fail.
Signed-off-by: Longxiang Lyu lolv@microsoft.com
How did you do it?
How did you verify/test it?
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation