[tests/vxlan]: Set VXLAN tunnel ttl_mode=pipe for cisco-8000 platforms - #1378
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Signed-off-by: Aakash Tiwari <aaktiwar@cisco.com>
Aakash Tiwari (aakashtiwari2630-max)
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August 27, 2026 00:38
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Porting master PR: sonic-net/sonic-mgmt#26084
Summary of fix:
On cisco-8000, the base topology IP-in-IP decap tunnels already use pipe TTL mode. When VxLAN DECAP_TTL_MODE is not set consistently, orchagent fails to program the tunnel correctly. This change sets ttl_mode=pipe in the VXLAN_TUNNEL config entry whenever the DUT's asic_type is cisco-8000