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Cisco IOS XE Switch L2S Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000512-L2S-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have Storm Control configured on all host-facing switchports.

    &lt;VulnDiscussion&gt;A traffic storm occurs when packets flood a LAN, creating excessive traffic and degrading network performance. Traffic storm ...
    Rule Low Severity
    Show

  • SRG-NET-000512-L2S-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have IGMP or MLD Snooping configured on all VLANs.

    &lt;VulnDiscussion&gt;IGMP and MLD snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP or MLD membership repo...
    Rule Low Severity
    Show

  • SRG-NET-000512-L2S-000003

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must implement Rapid STP where VLANs span multiple switches with redundant links.

    &lt;VulnDiscussion&gt;Spanning Tree Protocol (STP) is implemented on bridges and switches to prevent layer 2 loops when a broadcast domain spans mu...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000004

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must enable Unidirectional Link Detection (UDLD) to protect against one-way connections.

    &lt;VulnDiscussion&gt;In topologies where fiber optic interconnections are used, physical misconnections can occur that allow a link to appear to b...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have all trunk links enabled statically.

    &lt;VulnDiscussion&gt;When trunk negotiation is enabled via Dynamic Trunk Protocol (DTP), considerable time can be spent negotiating trunk settings...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000007

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have all disabled switch ports assigned to an unused VLAN.

    &lt;VulnDiscussion&gt;It is possible that a disabled port that is assigned to a user or management VLAN becomes enabled by accident or by an attack...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000008

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not have the default VLAN assigned to any host-facing switch ports.

    &lt;VulnDiscussion&gt;In a VLAN-based network, switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with other ne...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000009

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have the default VLAN pruned from all trunk ports that do not require it.

    &lt;VulnDiscussion&gt;The default VLAN (i.e., VLAN 1) is a special VLAN used for control plane traffic such as Spanning-Tree Protocol (STP), Dynami...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000010

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not use the default VLAN for management traffic.

    &lt;VulnDiscussion&gt;Switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with directly connected switches using...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000011

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have all user-facing or untrusted ports configured as access switch ports.

    &lt;VulnDiscussion&gt;Double encapsulation can be initiated by an attacker who has access to a switch port belonging to the native VLAN of the trun...
    Rule Medium Severity
    Show

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