The HP FlexFabric Switch must have all trunk links enabled statically.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-66081 | HFFS-L2-000022 | SV-80571r1_rule | CCI-000366 | medium |
| 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. | ||||
| STIG | Date | |||
| HP FlexFabric Switch L2S Security Technical Implementation Guide | 2020-06-03 | |||
Details
Check Text (C-80571r1_chk)
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 Text (F-72157r1_fix)
Configure the HP FlexFabric Switch to enable trunk links statically.
[HP-GigabitEthernet1/0/1]port link-type trunk