The HP FlexFabric Switch must configure the maximum hop limit value to at least 32.

From HP FlexFabric Switch RTR Security Technical Implementation Guide

Associated with: CCI-001097

SV-80615r1_rule The HP FlexFabric Switch must configure the maximum hop limit value to at least 32.

Vulnerability discussion

The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message to be used by hosts instead of the standardized default value. If a very small value was configured and advertised to hosts on the LAN segment, communications would fail due to the hop limit reaching zero before the packets sent by a host reached their destination.

Check content

Review the HP FlexFabric Switch configuration to determine if the maximum hop limit has been configured. If the maximum hop limit is not configured, this is a finding. If it has been configured, then it must be set to at least 32; otherwise this is a finding. [5900CP]display current-configuration | i hop-limit ipv6 hop-limit 255 Note: The default value for the maximum hop limit is 64.

Fix text

If the max hop set is not configured then use the following command to configure it: [HP] ipv6 hop-limit 255

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