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[linux-cp/dpdk] Fix sub-port and LAG sub-port datapath on sonic-platform-vpp #237

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[linux-cp/dpdk] Fix sub-port and LAG sub-port datapath on sonic-platform-vpp #237

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1e14127
[linux-cp]: Enable lcp-sync to auto-up sub-port host netdev
lunyue-ms May 17, 2026
e146d64
[dpdk]: Enable promisc on DPDK ports via dedicated supervisord program
lunyue-ms May 18, 2026
71799c5
[linux-cp]: Disable lcp-auto-subint to fix LAG sub-port LCP pair coll…
lunyue-ms May 20, 2026
01b7c67
[dpdk]: Stop vpp_promisc.sh restart storm and harden promisc state check
lunyue-ms May 23, 2026
cbfb6ed
[docs/HLD]: Document LAG sub-port architecture
lunyue-ms May 25, 2026
dfb2902
[linux-cp]: Align lcp-auto-subint state across syncd-vpp and sonic-vpp
lunyue-ms May 26, 2026
30359db
Remove vpp_promisc.sh; promisc now set via sairedis VPP API
lunyue-ms May 31, 2026
37a4d40
[docs/HLD]: Align LAG subinterface HLD with implementation
lunyue-ms Jun 2, 2026
46f448c
[docs/HLD]: revert LAG sub-port HLD; keep plain Ethernet sub-port
lunyue-ms Jun 15, 2026
2be196a
[linux-cp]: fix stale lcp-auto-subint comment (drop removed tc bridge)
lunyue-ms Jun 15, 2026
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7 changes: 6 additions & 1 deletion docker-sonic-vpp/conf/startup.conf.tmpl
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Expand Up @@ -301,5 +301,10 @@ plugins {

# Why not support sub interfaces
linux-cp {
lcp-auto-subint
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# lcp-auto-subint disabled so sairedis owns sub-port LCP pair creation
# explicitly (vpp_create_router_interface, SUB_PORT path: create_subif +
# configure_lcp_interface). With it enabled VPP would also auto-create the
# pair, colliding with the explicit one.
# lcp-auto-subint
lcp-sync
}
7 changes: 6 additions & 1 deletion docker-syncd-vpp/conf/startup.conf.tmpl
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Expand Up @@ -289,5 +289,10 @@ plugins {

# Why not support sub interfaces
linux-cp {
lcp-auto-subint
# lcp-auto-subint disabled so sairedis owns sub-port LCP pair creation
# explicitly (vpp_create_router_interface, SUB_PORT path: create_subif +
# configure_lcp_interface). With it enabled VPP would also auto-create the
# pair, colliding with the explicit one.
# lcp-auto-subint
lcp-sync
}
2 changes: 1 addition & 1 deletion docs/HLD/SONICVPP-HLD.md
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Expand Up @@ -360,7 +360,7 @@ The following table summarizes the flow from configuration to VPP/LCP API for di
| **Front-Panel** | Loaded from `config_db.json` | `\|c\|SAI_OBJECT_TYPE_HOSTIF:oid:0xd000000000080`<br>`SAI_HOSTIF_ATTR_NAME=Ethernet0`| *vpp intf pre-created using generated `startup.conf` | `lcp_itf_pair_add_del(vpp_ifname,EthernetX)`<br><br>>`itf-pair: [0] bobm0 tap4096 Ethernet0 10 type tap` | N/A |
| **PortChannel** | sudo config portchannel add PortChannel10<br>sudo&nbsp;config&nbsp;portchannel&nbsp;member&nbsp;add&nbsp;PortChannel10&nbsp;Ethernet4 | `\|c\|SAI_OBJECT_TYPE_LAG:oid:0x2000000000095`<br>`\|c\|SAI_OBJECT_TYPE_LAG_MEMBER:oid:0x1b000000000096`<br>`SAI_LAG_MEMBER_ATTR_LAG_ID=oid:0x2000000000095` | `bond_create`<br>`bond_add_member` | `lcp_itf_pair_add_del(BondEthernetX,beX)`<br><br>>`itf-pair: [4] BondEthernet10 tap4099 be10 16 type tap` | `beX`<br>--><br>`PortChannelX` |
| **Loopback** | sudo config interface ip add Loopback0 10.0.0.1/32 | `\|c\|SAI_OBJECT_TYPE_ROUTE_ENTRY:{"dest":"10.0.0.1/32","` | `create_loopback_instance`<br>`sw_interface_add_del_address` | `lcp_itf_pair_add_del(loopX,tap_LoopbackX)`<br><br>>`itf-pair: [2] loop0 tap4098 tap_Loopback0 13 type tap` | `tap_LoopbackX`<br>--><br>`LoopbackX` |
| **Subinterface** | sudo config subinterface add Ethernet0.10 10 | `\|c\|SAI_OBJECT_TYPE_ROUTER_INTERFACE:oid:0x6000000000094`<br>`SAI_ROUTER_INTERFACE_ATTR_TYPE=SAI_ROUTER_INTERFACE_TYPE_SUB_PORT` | `create_subif`| `lcp_itf_pair_add_del` automatically invoked with `lcp-auto-subinf` enabled<br><br>>`itf-pair: [3] bobm0.10 tap4096.10 Ethernet0.10 14 type tap` | N/A, shares parent tap |
| **Subinterface** | sudo config subinterface add Ethernet0.10 10 | `\|c\|SAI_OBJECT_TYPE_ROUTER_INTERFACE:oid:0x6000000000094`<br>`SAI_ROUTER_INTERFACE_ATTR_TYPE=SAI_ROUTER_INTERFACE_TYPE_SUB_PORT` | `create_subif`| Explicit `configure_lcp_interface(bobmX.10, EthernetX.10)` from sairedis (with `lcp-auto-subint = disabled` in startup.conf)<br><br>>`itf-pair: [3] bobm0.10 tap4096.10 Ethernet0.10 14 type tap` | N/A, shares parent tap |


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