STIGQter: STIG Summary: Cisco IOS XE Switch RTR Security Technical Implementation Guide Version: 3 Release: 4 Benchmark Date: 01 Apr 2026:

The Cisco PE switch must be configured to ignore or drop all packets with any IP options.

DISA Rule

SV-221049r945860_rule

Vulnerability Number

V-221049

Group Title

SRG-NET-000205-RTR-000016

Rule Version

CISC-RT-000750

Severity

CAT II

CCI(s)

• CCI-002403 - Only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Configure the switch to ignore or drop all packets with IP options as shown in the examples below:

SW1(config)#ip options ignore

or

SW1(config)#ip options drop

Check Contents

Review the switch configuration to determine if it will ignore or drop all packets with IP options as shown in the examples below:

ip options drop
or
ip options ignore

If the switch is not configured to drop or block all packets with IP options, this is a finding.

Vulnerability Number

V-221049

Documentable

False

Rule Version

CISC-RT-000750

Severity Override Guidance

Review the switch configuration to determine if it will ignore or drop all packets with IP options as shown in the examples below:

ip options drop
or
ip options ignore

If the switch is not configured to drop or block all packets with IP options, this is a finding.

Check Content Reference

M

Target Key

4074