STIGQter: STIG Summary: Cisco IOS XR Router RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

The Cisco perimeter router must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.

DISA Rule

SV-216764r531087_rule

Vulnerability Number

V-216764

Group Title

SRG-NET-000364-RTR-000111

Rule Version

CISC-RT-000360

Severity

CAT III

CCI(s)

• CCI-002403 - The information system only allows incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Disable LLDP transmit on all external interfaces as shown in the example below.

RP/0/0/CPU0:R3(config)#interface g0/0/0/1
RP/0/0/CPU0:R3(config-if)#lldp transmit disable

Check Contents

This requirement is not applicable for the DODIN Backbone.

Step 1: Verify LLDP is not enabled globally via the command

lldp

By default LLDP is not enabled globally. If LLDP is enabled, proceed to step 2.

Step 2: Verify LLDP transmit is disabled on any external interface as shown in the example below.

interface GigabitEthernet0/0/0/1
ipv4 address x.1.34.3 255.255.255.252
lldp
transmit disable

Note: LLDP is enabled by default on all interfaces once it is enabled globally; hence the commands lldp transmit and lldp receive will not be visible on the interface configuration.

If LLDP transmit is enabled on any external interface, this is a finding.

Vulnerability Number

V-216764

Documentable

False

Rule Version

CISC-RT-000360

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Step 1: Verify LLDP is not enabled globally via the command

lldp

By default LLDP is not enabled globally. If LLDP is enabled, proceed to step 2.

Step 2: Verify LLDP transmit is disabled on any external interface as shown in the example below.

interface GigabitEthernet0/0/0/1
ipv4 address x.1.34.3 255.255.255.252
lldp
transmit disable

Note: LLDP is enabled by default on all interfaces once it is enabled globally; hence the commands lldp transmit and lldp receive will not be visible on the interface configuration.

If LLDP transmit is enabled on any external interface, this is a finding.

Check Content Reference

M

Target Key

4029

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