The out-of-band management (OOBM) Arista gateway router must be configured to not redistribute routes between the management network routing domain and the managed network routing domain.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-256006	ARST-RT-000200	SV-256006r882360_rule		Medium

Description
If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries; otherwise, it is possible that management traffic will not be separated from production traffic. Since the managed network and the management network are separate routing domains, separate Interior Gateway Protocol routing instances must be configured on the router, one for the managed network and one for the OOBM network. In addition, the routes from the two domains must not be redistributed to each other.

Description

If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries; otherwise, it is possible that management traffic will not be separated from production traffic. Since the managed network and the management network are separate routing domains, separate Interior Gateway Protocol routing instances must be configured on the router, one for the managed network and one for the OOBM network. In addition, the routes from the two domains must not be redistributed to each other.

STIG	Date
Arista MLS EOS 4.2x Router Security Technical Implementation Guide	2023-01-17

Details

Check Text ( C-59682r882358_chk )
This requirement is not applicable for the DODIN backbone. Verify the Interior Gateway Protocol instance used for the managed network does not redistribute routes into the Interior Gateway Protocol instance used for the management network and vice versa. PROD IGP Routing Domain: Step 1: To verify interfaces and vrf instance are configured, execute the command "show run int YY". interface Et3/17/1 description To_PROD ip address 10.1.12.1/24 Step 2: Verify the OSPF configuration, the PROD subnet is advertised, and IGP redistribution is removed in the OSPF process. To verify the OSPF configuration, execute the command "show run section router ospf". router ospf 100 vrf PROD network 10.1.0.0/24 area 0.0.0.0 no redistribute rip OOBM IGP Routing Domain, running on the management network Step 3: To verify interfaces are configured, execute the command "show run int YY". interface Et3/17/2 description To_OOBM ip address 172.16.10.1/24 Step 4: Verify the RIP configuration, the OOBM subnet is advertised, and IGP redistribution is removed in the RIP process. To verify the RIP configuration, execute the command "show run section router rip". router rip network 172.16.10.0/24 no redistribute ospf no shutdown If the Interior Gateway Protocol instance used for the managed network redistributes routes into the Interior Gateway Protocol instance used for the management network or vice versa, this is a finding.

Check Text ( C-59682r882358_chk )

This requirement is not applicable for the DODIN backbone.

Verify the Interior Gateway Protocol instance used for the managed network does not redistribute routes into the Interior Gateway Protocol instance used for the management network and vice versa.

PROD IGP Routing Domain:

Step 1: To verify interfaces and vrf instance are configured, execute the command "show run int YY".

interface Et3/17/1
description To_PROD
ip address 10.1.12.1/24

Step 2: Verify the OSPF configuration, the PROD subnet is advertised, and IGP redistribution is removed in the OSPF process. To verify the OSPF configuration, execute the command "show run section router ospf".

router ospf 100 vrf PROD
network 10.1.0.0/24 area 0.0.0.0
no redistribute rip

OOBM IGP Routing Domain, running on the management network

Step 3: To verify interfaces are configured, execute the command "show run int YY".

interface Et3/17/2
description To_OOBM
ip address 172.16.10.1/24

Step 4: Verify the RIP configuration, the OOBM subnet is advertised, and IGP redistribution is removed in the RIP process. To verify the RIP configuration, execute the command "show run section router rip".

router rip
network 172.16.10.0/24
no redistribute ospf
no shutdown

If the Interior Gateway Protocol instance used for the managed network redistributes routes into the Interior Gateway Protocol instance used for the management network or vice versa, this is a finding.

Fix Text (F-59625r882359_fix)
This requirement is not applicable for the DODIN backbone. Configure the Interior Gateway Protocol instance used for the managed network to prohibit redistribution of routes into the Interior Gateway Protocol instance used for the management network and vice versa. PROD IGP Routing Domain: Step 1: Configure the interface. interface Et3/17/1 description To_PROD ip address 10.1.12.1/24 Step 2: Configure the OSPF process to remove the IGP redistribution. router ospf 100 network 10.1.0.0/24 area 0.0.0.0 no redistribute rip OOBM IGP Routing Domain, running on the management network Step 3: Configure the interface. interface Et3/17/1 description To_OOBM ip address 172.16.10.1/24 Step 4: Configure the RIP process to remove the IGP redistribution. router rip network 172.16.10.0/24 no redistribute ospf no shutdown

Fix Text (F-59625r882359_fix)

This requirement is not applicable for the DODIN backbone.

Configure the Interior Gateway Protocol instance used for the managed network to prohibit redistribution of routes into the Interior Gateway Protocol instance used for the management network and vice versa.

PROD IGP Routing Domain:

Step 1: Configure the interface.

interface Et3/17/1
description To_PROD
ip address 10.1.12.1/24

Step 2: Configure the OSPF process to remove the IGP redistribution.

router ospf 100
network 10.1.0.0/24 area 0.0.0.0
no redistribute rip

OOBM IGP Routing Domain, running on the management network

Step 3: Configure the interface.

interface Et3/17/1
description To_OOBM
ip address 172.16.10.1/24

Step 4: Configure the RIP process to remove the IGP redistribution.

router rip
network 172.16.10.0/24
no redistribute ospf
no shutdown