The HP FlexFabric Switch must have all trunk links enabled statically.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-66081 | SRG-NET-000512-L2S-000005 | HFFS-L2-000022 | SV-80571r1_rule | 2020-06-03 | 1 |
| Description |
|---|
| When trunk negotiation is enabled via Dynamic Trunk Protocol (DTP), considerable time can be spent negotiating trunk settings (802.1q or ISL) when a node or interface is restored. While this negotiation is happening, traffic is dropped because the link is up from a layer 2 perspective. Packet loss can be eliminated by setting the interface statically to trunk mode, thereby avoiding dynamic trunk protocol negotiation and significantly reducing any outage when restoring a failed link or switch. |
| ℹ️ Check |
|---|
| Review the HP FlexFabric Switch configuration to verify that trunk negotiation is disabled by statically configuring all trunk links. Configuring a command to manually disable negotiation may also be required for some switch platforms. If trunk negotiation is enabled on any interface, this is a finding. Sample output: interface GigabitEthernet1/0/1 port link-type trunk port trunk permit vlan X |
| ✔️ Fix |
|---|
| Configure the HP FlexFabric Switch to enable trunk links statically. [HP-GigabitEthernet1/0/1]port link-type trunk |