Cisco Prime Network Reference Guide, 3.8 - Using mLACP Commands [Cisco Prime Network]

Table Of Contents

Using mLACP Commands

Supported Network Elements

Show Group

Show MPLS LDP

Show Channel

Show LACP Internal

Using mLACP Commands

In Carrier Ethernet networks, various redundancy mechanisms provide resilient interconnection of nodes and networks. The choice of redundancy mechanisms depends on various factors such as:

•Transport technology

•Topology

•Single node versus entire network multihoming

•Capability of devices

•Autonomous system (AS) boundaries

•Service provider operations model

•Service provider preferences.

Carrier Ethernet network high-availability can be achieved by employing both intra and interchassis redundancy mechanisms. The Multichassis EtherChannel (MCEC) solution of Cisco addresses the need for interchassis redundancy mechanisms, where a carrier wants to dual home a device to two upstream points of attachments (PoAs) for redundancy.

In Multichassis EtherChannel (MCEC), the DHD is dual-homed to two upstream PoAs. The DHD is incapable of running any loop prevention control protocol such as Multiple Spanning Tree (MST). Therefore, another mechanism is required to prevent forwarding loops over the redundant setup.

LACP, as defined in IEEE 802.3ad, is a link-level control protocol that allows the dynamic negotiation and establishment of LAGs. An extension of the LACP implementation to PoAs is required to convey to a DHD that it is connected to a single virtual LACP peer and not to two disjointed devices. This extension is called Multichassis LACP or mLACP.

The PoAs forming a virtual LACP peer, from the perspective of the DHD, are defined as members of a redundancy group. For the PoAs in a redundancy group to appear as a single device to the DHD, the states between them must be synchronized through the Interchassis Communication Protocol (ICCP), which provides a control-only interchassis communication channel (ICC).

Supported Network Elements

You can run the mLACP commands on all Cisco IOS and Cisco IOS XR devices that support pseudowire technology, such as

•Cisco 7600 series devices

•Cisco 6509 NEB-A series devices

•Cisco ASR 9000 series routers.

See Part 1—Cisco VNEs for details on the software versions Prime Network supports for these network elements. To run the mLACP commands, the software on the network element must support the mLACP technology.

Show Group

Use the Show Group command to show the group.

Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation.

Step 2 Right-click the required interface and choose Commands > Show > Show Group. The Show Group dialog box opens.

Step 3 To see the command that will be applied on the device, click Preview.

Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command.

Step 5 To run the command, click Execute Now.

Any errors are displayed in the Result tab.

Step 6 To close the dialog box, click Close.

Show MPLS LDP

Use the Show MPLS Label Distribution Protocol (LDP) command to show the LDP used by the selected network element.

Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation.

Step 2 Right-click the required interface and choose Commands > Show > Show Mpls Ldp. The Show MPLS LDP dialog box opens.

Step 3 To see the command that will be applied on the device, click Preview.

Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command.

Step 5 To run the command, click Execute Now.

Any errors are displayed in the Result tab.

Step 6 To close the dialog box, click Close.

Show Channel

Use the Show Channel command to show the channel in the selected network element.

Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation.

Step 2 Right-click the required interface and choose Commands > Show > Show Channel. The Show Channel dialog box opens.

Step 3 To see the command that will be applied on the device, click Preview.

Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command.

Step 5 To run the command, click Execute Now.

Any errors are displayed in the Result tab.

Step 6 To close the dialog box, click Close.

Show LACP Internal

Use the Show Link Aggregation Control Protocol (LACP) Internal command to show the LACP in the selected network element.

Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation.

Step 2 Right-click the required interface and choose Commands > Show > Show Lacp Internal. The Show Lacp Internal dialog box opens.

Step 3 To see the command that will be applied on the device, click Preview.

Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command.

Step 5 To run the command, click Execute Now.

Any errors are displayed in the Result tab.

Step 6 To close the dialog box, click Close.

	Cisco Prime Network Reference Guide, 3.8
	Using mLACP Commands
Cisco Prime Network Reference Guide, 3.8 Preface Part 1: Cisco VNE Introduction Overview- Supported Network Elements in Cisco Prime Network Support Information for Cisco Security Appliances Support Information for Cisco Access Servers Support Information for Cisco Gateways Support Information for Cisco Routers Support Information for Cisco Switches Support Information for Cisco Optical Transport Support Information for Cisco Generic Devices Part 2: Technology Support Technology Support Introduction VNE Topology Part 3: Alarms and Events System Events Security Events Service Alarms Traps Syslogs Part 4: Commands Using Connectivity Fault Management Commands Using Resilient Ethernet Protocol Commands Using Carrier Grade NAT Commands Using Pseudowire Virtual Circuit Connectivity Verification Commands Using Link Operations, Administration and Maintanence Operations Commands Using Ethernet Local Management Interface Commands Using MPLS-TP Commands Using mLACP Commands Using the Session Border Controller Commands Using the SONET and DWDM Commands Using Basic Operations Commands Index	Download this chapter Using mLACP Commands Download the complete book Book-length PDF (PDF - 7 MB) Feedback Table Of Contents Using mLACP Commands Supported Network Elements Show Group Show MPLS LDP Show Channel Show LACP Internal Using mLACP Commands In Carrier Ethernet networks, various redundancy mechanisms provide resilient interconnection of nodes and networks. The choice of redundancy mechanisms depends on various factors such as: •Transport technology •Topology •Single node versus entire network multihoming •Capability of devices •Autonomous system (AS) boundaries •Service provider operations model •Service provider preferences. Carrier Ethernet network high-availability can be achieved by employing both intra and interchassis redundancy mechanisms. The Multichassis EtherChannel (MCEC) solution of Cisco addresses the need for interchassis redundancy mechanisms, where a carrier wants to dual home a device to two upstream points of attachments (PoAs) for redundancy. In Multichassis EtherChannel (MCEC), the DHD is dual-homed to two upstream PoAs. The DHD is incapable of running any loop prevention control protocol such as Multiple Spanning Tree (MST). Therefore, another mechanism is required to prevent forwarding loops over the redundant setup. LACP, as defined in IEEE 802.3ad, is a link-level control protocol that allows the dynamic negotiation and establishment of LAGs. An extension of the LACP implementation to PoAs is required to convey to a DHD that it is connected to a single virtual LACP peer and not to two disjointed devices. This extension is called Multichassis LACP or mLACP. The PoAs forming a virtual LACP peer, from the perspective of the DHD, are defined as members of a redundancy group. For the PoAs in a redundancy group to appear as a single device to the DHD, the states between them must be synchronized through the Interchassis Communication Protocol (ICCP), which provides a control-only interchassis communication channel (ICC). Supported Network Elements You can run the mLACP commands on all Cisco IOS and Cisco IOS XR devices that support pseudowire technology, such as •Cisco 7600 series devices •Cisco 6509 NEB-A series devices •Cisco ASR 9000 series routers. See Part 1—Cisco VNEs for details on the software versions Prime Network supports for these network elements. To run the mLACP commands, the software on the network element must support the mLACP technology. Show Group Use the Show Group command to show the group. Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation. Step 2 Right-click the required interface and choose Commands > Show > Show Group. The Show Group dialog box opens. Step 3 To see the command that will be applied on the device, click Preview. Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command. Step 5 To run the command, click Execute Now. Any errors are displayed in the Result tab. Step 6 To close the dialog box, click Close. Show MPLS LDP Use the Show MPLS Label Distribution Protocol (LDP) command to show the LDP used by the selected network element. Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation. Step 2 Right-click the required interface and choose Commands > Show > Show Mpls Ldp. The Show MPLS LDP dialog box opens. Step 3 To see the command that will be applied on the device, click Preview. Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command. Step 5 To run the command, click Execute Now. Any errors are displayed in the Result tab. Step 6 To close the dialog box, click Close. Show Channel Use the Show Channel command to show the channel in the selected network element. Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation. Step 2 Right-click the required interface and choose Commands > Show > Show Channel. The Show Channel dialog box opens. Step 3 To see the command that will be applied on the device, click Preview. Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command. Step 5 To run the command, click Execute Now. Any errors are displayed in the Result tab. Step 6 To close the dialog box, click Close. Show LACP Internal Use the Show Link Aggregation Control Protocol (LACP) Internal command to show the LACP in the selected network element. Step 1 In the inventory window, expand the Logical Inventory tree and choose Ethernet Link Aggregation. Step 2 Right-click the required interface and choose Commands > Show > Show Lacp Internal. The Show Lacp Internal dialog box opens. Step 3 To see the command that will be applied on the device, click Preview. Step 4 To schedule the command, click the Scheduling tab. For more details on scheduling, see Scheduling a Command. Step 5 To run the command, click Execute Now. Any errors are displayed in the Result tab. Step 6 To close the dialog box, click Close.
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