- Preface
- New and Changed Information
- Understanding the Carrier Packet Transport System
- Hardware
- Configuring Ethernet Virtual Circuit
- Configuring Multiprotocol Label Switching
- Configuring MPLS–Transport Profile
- Configuring Pseudowire
- Configuring Virtual Private LAN Services
- Configuring Quality of Service
- Configuring High Availability
- Configuring Resilient Ethernet Protocol
- Configuring Link Aggregation Group and Link Aggregation Control Protocol
- Configuring Span
- Configuring MAC Learning
- Configuring Multicast VLAN Registration
- Configuring IGMP Snooping
- Configuring Ethernet OAM, Connectivity Fault Management, and Y.1731
- Configuring Synchronous Ethernet
- Configuring Performance Monitoring, RMON, OTN, and Port Provisioning
- Configuring Local Authentication
- Configuring Cisco Discovery Protocol
- Alarm Troubleshooting
- SNMP
- CPT Error Messages
- Support for MSTP Cards
- Network Element Defaults
- Index
Cisco CPT Configuration Guide–CTC and Documentation Release 9.7.0.2 and Cisco IOS Release 15.2(02) SC2
Bias-Free Language
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
- Updated:
- January 31, 2018
Chapter: Configuring Link Aggregation Group and Link Aggregation Control Protocol
Contents
- Configuring Link Aggregation Group and Link Aggregation Control Protocol
- Understanding IEEE 802.3ad Link Bundling
- Link Aggregation Group and Link Aggregation Control Protocol Configuration Procedures
- Understanding LACP
- NTP-J2 Manage LACP
- DLP-J5 Configure and Retrieve a Port Channel Using Cisco IOS Commands
- DLP-J6 Configure LACP over Port Channel Using Cisco IOS Commands
- DLP-J7 Monitor LACP Status Using Cisco IOS Commands
- Understanding LACP Priority
- NTP-J3 Set LACP Priority
- DLP-J8 Set LACP System Priority Using Cisco IOS Commands
- DLP-J9 Set LACP System Priority Using CTC
- Understanding LACP 1:1 Redundancy
- NTP-J4 Configure LACP 1:1 Redundancy with Fast Switchover Using Cisco IOS Commands
- Understanding LAG
- NTP-J5 Manage a Channel Group
- DLP-J11 Configure a Channel Group with LACP Using Cisco IOS Commands
- DLP-J12 Configure a Channel Group Without LACP Using Cisco IOS Commands
- DLP-J13 Add and Remove Interfaces from a Channel Group Using Cisco IOS Commands
- DLP-J14 Set a Minimum and Maximum Threshold of Active Links Using Cisco IOS Commands
- DLP-J15 Create a Channel Group Using CTC
- DLP-J16 Edit a Channel Group Using CTC
- Understanding Load Balancing
- NTP-J6 Configure Manual Load Balancing
- DLP-J17 Configure Manual Load Balancing Using Cisco IOS Commands
- DLP-J18 Configure Manual Load Balancing Using CTC
- Show Commands
- Interactions of LAG with Other Features
Configuring Link Aggregation Group and Link Aggregation Control Protocol
This chapter describes Link Aggregation Group, Link Aggregation Control Protocol, and manual load balancing. This chapter also describes the configuration procedures.
This chapter includes the following topics.
- Understanding IEEE 802.3ad Link Bundling
- Link Aggregation Group and Link Aggregation Control Protocol Configuration Procedures
- Understanding LACP
- Understanding LACP Priority
- Understanding LACP 1:1 Redundancy
- Understanding LAG
- Understanding Load Balancing
- Show Commands
- Interactions of LAG with Other Features
Understanding IEEE 802.3ad Link Bundling
The IEEE 802.3ad Link Bundling feature provides a method for aggregating multiple Ethernet links into a single logical channel based on the IEEE 802.3ad standard. This feature helps improve the cost effectiveness of a device by increasing cumulative bandwidth without necessarily requiring hardware upgrades. In addition, the IEEE 802.3ad Link Bundling feature provides a capability to dynamically provision, manage, and monitor various aggregated links and enables interoperability between various Cisco devices and devices of third-party vendors.
Benefits of Link Bundling
The IEEE 802.3ad Link Bundling feature provides the following benefits:
Increased network capacity without changing physical connections or upgrading hardware.
Cost savings resulting from use of existing hardware and software for additional functions.
A standard solution that enables interoperability of network devices.
Port redundancy without user intervention when an operational port fails.
Link Aggregation Group and Link Aggregation Control Protocol Configuration Procedures
The following procedures can be performed using Cisco IOS commands to configure Link Aggregation Group (LAG) and Link Aggregation Control Protocol (LACP):
DLP-J5 Configure and Retrieve a Port Channel Using Cisco IOS Commands
DLP-J6 Configure LACP over Port Channel Using Cisco IOS Commands
NTP-J4 Configure LACP 1:1 Redundancy with Fast Switchover Using Cisco IOS Commands
DLP-J11 Configure a Channel Group with LACP Using Cisco IOS Commands
DLP-J12 Configure a Channel Group Without LACP Using Cisco IOS Commands
DLP-J13 Add and Remove Interfaces from a Channel Group Using Cisco IOS Commands
DLP-J14 Set a Minimum and Maximum Threshold of Active Links Using Cisco IOS Commands
DLP-J17 Configure Manual Load Balancing Using Cisco IOS Commands
The following procedures can be performed using CTC to configure LAG and LACP:
Understanding LACP
The LACP is part of the IEEE802.3ad standard that enables you to bundle several physical ports together to form a single logical channel. LACP enables a network device, such as a switch, to negotiate an automatic bundling of links by sending LACP packets to the peer device. The LACP is a control protocol over LAG to check for any LAG misconfigurations.
LACP enables you to form a single Layer 2 link automatically from two or more Ethernet links. This protocol ensures that both ends of the Ethernet link are functional and agree to be members of the aggregation group. LACP must be enabled at both ends of the link to be operational.
For more information on LACP, see the IEEE802.3ad standard document.
LACP Advantages
LACP provides high reliability and redundancy. If a port fails, traffic continues on the remaining ports.
LACP Functions
LACP performs the following functions in the system:
LACP Modes
LACP can be configured in the following modes:
Active—In this mode, the ports send LACP packets at regular intervals to the partner ports.
Passive—In this mode, the ports do not send LACP packets until the partner port sends LACP packets. After receiving the LACP packets from the partner port, the ports send LACP packets to the partner port.
 Note | When you enable LACP on the channel group, LACP exchanges Protocol Data Units (PDU) of size 128 bytes. Hence, if the Maximum Transmission Unit (MTU) size of the channel group is set to a value less than 128 bytes, the protocol data units are dropped and the channel group interface goes down. |
- NTP-J2 Manage LACP
- DLP-J5 Configure and Retrieve a Port Channel Using Cisco IOS Commands
- DLP-J6 Configure LACP over Port Channel Using Cisco IOS Commands
- DLP-J7 Monitor LACP Status Using Cisco IOS Commands
NTP-J2 Manage LACP
| Purpose | This procedure configures LACP and monitors LACP status. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Stop. You have completed this procedure. |
DLP-J5 Configure and Retrieve a Port Channel Using Cisco IOS Commands
| Purpose | This procedure configures and retrieves a port channel using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Note | You must manually create a port channel logical interface. Configuring the IP address on the port channel interface is not supported. |
Example: Verify the Port Channel Configuration
The following example shows how to verify the port channel configuration using Cisco IOS commands.
Router# show running-config interface port-channel 100Building configuration... Current configuration : 139 bytes ! interface Port-channel100 no ip address carrier-delay msec 0 l2protocol peer cdp lacp l2protocol forward stp vtp dtp pagp dot1x end
DLP-J6 Configure LACP over Port Channel Using Cisco IOS Commands
| Purpose | This procedure configures LACP using port channel using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
DLP-J7 Monitor LACP Status Using Cisco IOS Commands
| Purpose | This procedure monitors LACP activity in the network using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
For examples of show lacp commands, see Show Commands.
Understanding LACP Priority
LACP uses the following parameters to control aggregation:
LACP system priority—The system priority can be configured automatically or through the CLI. LACP uses the system priority with the device MAC address to form the system ID and also during negotiations with other systems. The range of LACP system priority is from 0 to 65535. The default value is 32768.
LACP port priority—The port priority can be configured automatically or through the CLI. LACP uses the port priority to decide which ports must be placed first in aggregation. LACP also uses the port priority with the port number to form the port identifier. The range of LACP port priority is from 0 to 65535. The default value is 32768.
LACP administrative key—LACP automatically configures an administrative key value on each port configured to use LACP. The administrative key defines the ability of a port to aggregate with other ports. The ability of the port to aggregate with the other ports is determined by the following:
- NTP-J3 Set LACP Priority
- DLP-J8 Set LACP System Priority Using Cisco IOS Commands
- DLP-J9 Set LACP System Priority Using CTC
NTP-J3 Set LACP Priority
| Purpose | This procedure sets LACP priority. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Stop. You have completed this procedure. |
DLP-J8 Set LACP System Priority Using Cisco IOS Commands
| Purpose | This procedure sets the LACP system priority using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
DLP-J9 Set LACP System Priority Using CTC
| Purpose | This procedure sets LACP system priority using CTC. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
| Step 1 | Complete the NTP-J22 Log into CTC procedure at a node where you want to set the LACP system priority. |
| Step 2 | From the View menu, choose Go to Home View. |
| Step 3 | Right–click the fabric or line card and choose Open Packet Transport System View. The Packet Transport System View dialog box appears. |
| Step 4 | Click the Provisioning tab. |
| Step 5 | From the left pane, click LACP. |
| Step 6 |
Enter the priority in the System Priority field. The range of the LACP system priority is from 0 to 65535. The default value is 32768. |
| Step 7 | Click Apply to set the LACP system priority. |
| Step 8 | Return to your originating procedure (NTP). |
Understanding LACP 1:1 Redundancy
The LACP 1:1 redundancy feature provides an EtherChannel configuration with one active link and fast switchover to a hot standby link.
To use the LACP 1:1 redundancy feature, configure the LACP EtherChannel with two ports (one active and one standby). If the active link goes down, the EtherChannel stays up and the system performs fast switchover to the hot standby link. When the failed link becomes operational again, the EtherChannel performs another fast switchover to revert to the original active link.
For the LACP 1:1 redundancy feature to work correctly, especially the fast switchover capability, the feature needs to be enabled at both ends of the link.
NTP-J4 Configure LACP 1:1 Redundancy with Fast Switchover Using Cisco IOS Commands
| Purpose | This procedure configures LACP 1:1 redundancy with fast switchover using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
For the LACP 1:1 redundancy feature, the channel group must contain two links, of which only one is active. The link with the lower port priority number (and therefore a higher priority) will be the active link, and the other link will be in a hot standby state. The maximum number of active member ports (lacp max–bundle) must be set to 1.
Example: Configure LACP 1:1 Redundancy with Fast Switchover
The following example shows how to configure the LACP channel group with 1:1 redundancy using Cisco IOS commands. Because the Ten Gigabit Ethernet port 4/1 is configured with a higher port priority number (and therefore a lower priority) than the default value of 32768, it will be the standby port.
Router> enable Router# configure terminal Router(config)# lacp system-priority 33000 Router(config)# interface TenGigabitEthernet4/1 Router(config-if)# channel-group 1 mode active Router(config)# interface TenGigabitEthernet4/1 Router(config-if)# lacp port-priority 33000 Router(config)# interface port-channel 1 Router(config-if)# lacp fast-switchover Router(config-if)# lacp max-bundle 1 Router(config-if)# end Router(config)# show run interface port-channel 1
Understanding LAG
The LAG or an EtherChannel, bundles individual Ethernet links into a single logical link that provides the aggregate bandwidth of up to eight physical links. When an Ethernet Flow Point is configured on LAG, the EFP is protected against link failures.
When a link within an EtherChannel fails, the traffic previously carried over the failed link switches to the remaining links within that EtherChannel.
LAG supports manual load balancing and platform default load balancing. LAG supports Ethernet services. LAG can be an attachment circuit for MPLS services.
The LACP is a control protocol that is supported on the LAG.
Restrictions of LAG in CPT
The following restrictions apply to LAG in CPT:
All the member links of LAG must be connected to the same CPT system and must be of the same interface type (10GE or 1GE). For example, one member link can be present in one CPT 50 and another member link can be present in another CPT 50. These two CPT 50 panels must be connected to the same CPT system.
All the member links of LAG must operate at the same link speed and in full-duplex mode. LACP does not support the half-duplex mode.
If you configure a physical port as part of LAG, you cannot configure Ethernet Virtual Circuits (EVCs) under that physical port.
The number of LAGs supported in the CPT system is 128 with 8 member links per LAG. A member link cannot belong to more than one LAG at the same time.
- NTP-J5 Manage a Channel Group
- DLP-J11 Configure a Channel Group with LACP Using Cisco IOS Commands
- DLP-J12 Configure a Channel Group Without LACP Using Cisco IOS Commands
- DLP-J13 Add and Remove Interfaces from a Channel Group Using Cisco IOS Commands
- DLP-J14 Set a Minimum and Maximum Threshold of Active Links Using Cisco IOS Commands
- DLP-J15 Create a Channel Group Using CTC
- DLP-J16 Edit a Channel Group Using CTC
NTP-J5 Manage a Channel Group
| Purpose | This procedure manages a channel group. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Stop. You have completed this procedure. |
DLP-J11 Configure a Channel Group with LACP Using Cisco IOS Commands
| Purpose | This procedure configures a channel group with LACP using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Example: Configure a Channel Group with LACP
The following example shows how to configure the channel group number 5 using Cisco IOS commands.
Router> enable Router# configure terminal Router(config)# interface port-channel5 Router(config)# interface TenGigabitEthernet 7/1 Router(config-if)# channel-group 5 mode active Router(config-if)# exit
DLP-J12 Configure a Channel Group Without LACP Using Cisco IOS Commands
| Purpose | This procedure configures a channel group without LACP using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Example: Configure a Channel Group Without Using LACP
The following example shows how to configure the channel group number 5 using Cisco IOS commands.
Router> enable Router# configure terminal Router(config)# interface port-channel5 Router(config)# interface TenGigabitEthernet 7/1 Router(config-if)# channel-group 5 link 1 Router(config-if)# exit
DLP-J13 Add and Remove Interfaces from a Channel Group Using Cisco IOS Commands
| Purpose | This procedure adds and removes interfaces from a channel group using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | DLP-J5 Configure and Retrieve a Port Channel Using Cisco IOS Commands |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Example: Add and Remove Interface from a Channel Group
The following example shows how to add an interface to a channel group using Cisco IOS commands:
Router> enable Router# configure terminal Router(config)# interface TenGigabitEthernet 5/0 Router(config-if)# channel-group 5 mode active Router(config-if)# exit
The following example shows how to remove an interface from a channel group using Cisco IOS commands:
Router> enable Router# configure terminal Router(config)# interface TenGigabitEthernet 5/0 Router(config-if)# no channel-group Router(config-if)# exit
DLP-J14 Set a Minimum and Maximum Threshold of Active Links Using Cisco IOS Commands
| Purpose | This procedure sets a minimum and maximum threshold of active links allowed in the LACP bundle using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Set a Minimum Threshold of Active Links
The following example shows how to set a minimum threshold of active member links using Cisco IOS commands:
Router> enable Router# configure terminal Router(config)# interface port-channel 1 Router(config-if)# lacp min-bundle 5 Router(config-if)# end
DLP-J15 Create a Channel Group Using CTC
| Purpose | This procedure creates a channel group using CTC. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
| Step 1 | Complete the NTP-J22 Log into CTC procedure at a node where you want to create a channel group. |
| Step 2 | From the View menu, choose Go to Home View. |
| Step 3 | Right-click the fabric or line card and choose Open Packet Transport System View. The Packet Transport System View dialog box appears. |
| Step 4 | Click the Provisioning tab. |
| Step 5 | In the left pane, click Channel Groups. |
| Step 6 | Click Create. The Channel Group Creation dialog box appears. |
| Step 7 | Enter the name of the channel group in the Name field. |
| Step 8 | From the ID drop-down list, choose an ID for this channel group. The IDs range from 1 to 128. |
| Step 9 | From the Standalone list, choose the ports that will belong to this channel group and click the right arrow button to move the selected ports to the Bundled list. |
| Step 10 | To create a channel group by configuring LACP: |
| Step 11 | To create a channel group without configuring LACP: |
| Step 12 | To delete a channel group, choose a channel group and click Delete. |
| Step 13 | Return to your originating procedure (NTP). |
DLP-J16 Edit a Channel Group Using CTC
| Purpose | This procedure edits a channel group using CTC. |
| Tools/Equipment | None |
| Prerequisite Procedures | DLP-J15 Create a Channel Group Using CTC |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
| Step 1 | Complete the NTP-J22 Log into CTC procedure at a node where you want to edit a channel group. |
| Step 2 | From the View menu, choose Go to Home View. |
| Step 3 | Right-click the fabric or line card and choose Open Packet Transport System View. The Packet Transport System View dialog box appears. |
| Step 4 | Click the Provisioning tab. |
| Step 5 | In the left pane, click Channel Groups. |
| Step 6 | Choose a channel group from the existing channel groups. |
| Step 7 |
Click Edit. The Edit Channel Group dialog box appears. You can modify all the parameters of the channel group except the name and ID. |
| Step 8 | To add ports to an existing channel group, choose the required ports from the Standalone list. Click the right arrow button to move the selected ports to the Bundled list. |
| Step 9 | To remove ports from an existing channel group, choose the required ports from the Bundled list. Click the left arrow button to move the selected ports to the Standalone list. |
| Step 10 | Modify the other parameters of the channel group, such as LACP mode of the channel group, soak time, minimum bundle, maximum bundle, LACP mode of ports, and Layer 2 action configuration as required. |
| Step 11 | Click Apply to edit the channel group. |
| Step 12 | Return to your originating procedure (NTP). |
Understanding Load Balancing
Manual load balancing enables you to manually specify which member link a service instance must use for its egress traffic. This allows you, who has knowledge about the type of traffic traversing an EFP, to equally distribute EFPs.
Note | The ingress traffic for any EFP can arrive on any member link of the LAG. All the egress traffic for the EFP must use only one of the member links. |
EFPs can be configured on a channel group. The traffic, carried by the EFPs, is load balanced across the member links. Ingress traffic for a single EVC can arrive on any member of the bundle. All egress traffic for an EFP uses only one of the member links. The load balancing is achieved by distributing EFPs between the member links. The EFPs on a channel group are grouped and each group is associated with a member link. The manual load balancing mechanism can be used to control the EFP grouping.
Note | CPT supports manual load balancing and platform default load balancing. CPT does not support weighted load balancing in this release. When manual load balancing is not configured and applied to the service instance, the default platform load balancing mechanism is used. |
Default Load Balancing
In the default load balancing mechanism, the EFP traffic is distributed based on a hashing algorithm that is determined by the service instance ID and the number of active members in the channel group. The default load balancing algorithm is explained below.
(Service-instance ID) ÷ max_num_links
The maximum number of member links (max_num_links) supported in CPT is 8. Hence, (Service-instance ID) ÷ max_num_links value provides a hash bit value from 0 to 7. This value is then compared with the load share of each member link.
The load share is allocated for each active member link based on the number of active member links in the channel group. The member link whose load share contains the hash bit is selected as the egress link.
The load share derivation is as follows:
The default load share allocation algorithm allocates the load share bits sequentially to the member links.
Let us consider that we have 4 active links as follows. The load share calculation varies based on the link ids defined.
Member-1:4/1- 0 0 0 1 0 0 0 1 = 0x11
Member-2:4/2- 0 0 1 0 0 0 1 0 = 0x22
Member-3:4/3- 0 1 0 0 0 1 0 0 = 0x44
Member-4:4/4- 1 0 0 0 1 0 0 0 = 0x88
Create a channel group and add 4 member links (4/1, 4/2, 4/3, and 4/4)
The load share is calculated for the active member links.
Create a service with id 10 on the channel group. In CTC, the service instance id is automatically generated and can be obtained from the configuration pane (Layer-2 -> Carrier Ethernet).
On applying the algorithm: (Service-instance ID) ÷ max_num_links, we get 10 ÷ 8 == 2 (hash bit).
In the loadshare derived above, the hash bit = 2 is set for the port 4/3 and hence 4/3 is chosen as the egress port for the service 10.
The same procedure is repeated when services are added to obtain the egress port.
- NTP-J6 Configure Manual Load Balancing
- DLP-J17 Configure Manual Load Balancing Using Cisco IOS Commands
- DLP-J18 Configure Manual Load Balancing Using CTC
NTP-J6 Configure Manual Load Balancing
| Purpose | This procedure configures manual load balancing. |
| Tools/Equipment | None |
| Prerequisite Procedures | None |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Stop. You have completed this procedure. |
DLP-J17 Configure Manual Load Balancing Using Cisco IOS Commands
| Purpose | This procedure configures manual load balancing on the member links of the LAG using Cisco IOS commands. |
| Tools/Equipment | None |
| Prerequisite Procedures | DLP-J11 Configure a Channel Group with LACP Using Cisco IOS Commands |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
Example: Configure Manual Load Balancing
The following example shows how the service instances 100 and 101 are manually assigned to link 1 on Ten Gigabit Ethernet interface 5/2. The service instances are also assigned backup links 2, 3, and 4.
Router# configure terminal Router(config)# interface port-channel 10 Router(config-if)# service instance 100 ethernet Router(config-if-srv)# encapsulation dot1q 100 Router(config-if-srv)# bridge-domain 100 Router(config-if-srv)# exit Router(config-if)# service instance 101 ethernet Router(config-if-srv)# encapsulation dot1q 101 Router(config-if-srv)# bridge-domain 101 Router(config-if-srv)# exit Router(config-if)# port-channel load-balance link 1 Router(config-if-lb)# backup link 2,3,4 Router(config-if-lb)# service-instance 100,101 Router(config-if-lb)# exit Router(config)# interface TenGigabitEthernet 5/2 Router(config-if)# channel-group 10 mode active link 1 Router(config-if)# exit
DLP-J18 Configure Manual Load Balancing Using CTC
| Purpose | This procedure configures manual load balancing on the ports of the channel group using CTC. |
| Tools/Equipment | None |
| Prerequisite Procedures | DLP-J15 Create a Channel Group Using CTC |
| Required/As Needed | As needed |
| Onsite/Remote | Onsite or remote |
| Security Level | Provisioning or higher |
| Step 1 | Complete the NTP-J22 Log into CTC procedure at a node where you want to configure manual load balancing. |
| Step 2 | From the View menu, choose Go to Home View. |
| Step 3 | Right-click the fabric or line card and choose Open Packet Transport System View. The Packet Transport System View dialog box appears. |
| Step 4 | Click the Provisioning tab. |
| Step 5 | From the left pane, click Channel Groups. |
| Step 6 | Click the Load Balancing tab. |
| Step 7 | From the LAG drop-down list, choose a channel group. |
| Step 8 | Click Create to configure manual load balancing on the ports of the channel group. The Manual Load Balancing dialog box appears. |
| Step 9 | From the Primary Loadbalanced Link list, choose a port. |
| Step 10 | From the Available Ports list, choose the required ports and click the right arrow button to move the ports to the Selected Ports list. The selected ports serve as the backup ports for the primary load balanced port. |
| Step 11 | Click Apply. See DLP-J2 Create an EVC Circuit Using CTC to choose a channel group as the EFP and configure manual load balancing on the channel group. |
| Step 12 | Return to your originating procedure (NTP). |
Show Commands
Display Port Channel Statistics
The following example shows how to view port channel statistics.
Router# show interfaces statsGigabitEthernet0/1 Switching path Pkts In Chars In Pkts Out Chars Out Processor 108470 31042570 82259 14255449 Route cache 0 0 0 0 Total 108470 31042570 82259 14255449 GigabitEthernet0/2 Switching path Pkts In Chars In Pkts Out Chars Out Processor 15979 19073260 15192 1325713 Route cache 0 0 0 0 Total 15979 19073260 15192 1325713 Port-channel15 Switching path Pkts In Chars In Pkts Out Chars Out Processor 0 0 0 0 Route cache 0 0 0 0 Total 0 0 0 0Router# show interfaces port-channel 2 stats
Port-channel2
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 570546645 295127854241 557694541 291427545417
Route cache 0 0 0 0
Total 570546645 295127854241 557694541 291427545417
Display Port Channel Interface
The following example shows how to view the information for a port channel interface. channel-id is an integer value between 1 to 128.
Router# show interfaces port-channel channel-id Router# show interfaces port-channel 20
Port-channel20 is up, line protocol is up
Hardware is GEChannel, address is 0002.0415.0002 (bia 0000.0000.0000)
MTU 9600 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
No. of active members in this channel: 1
Member 0 : TenGigabitEthernet4/2 , Full-duplex, 10000Mb/s
No. of passive members in this channel: 0
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
37 packets input, 7820 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
39 packets output, 8088 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
Display EFP Statistics
The following example shows how to view EFP statistics.
Router> show ethernet service instance statsSystem maximum number of service instances: 32768 Service Instance 2, Interface TenGigabitEthernet3/1 Pkts In Bytes In Pkts Out Bytes Out 0 0 0 0 Service Instance 2, Interface Port-channel15 Pkts In Bytes In Pkts Out Bytes Out 0 0 0 0
Note | The show ethernet service instance stats command does not display the EFP statistics for a pseudowire. Use the show mpls l2transport vc [vcid] [detail] command to view the EFP statistics for a pseudowire. |
Display LACP Activity
The following examples show how to view LACP activity in the network.
Router# show lacp internal
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 20
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Te4/2 SA bndl 32768 0x5 0x5 0x42 0x3D
Router# show lacp 20 counters
LACPDUs Marker Marker Response LACPDUs
Port Sent Recv Sent Recv Sent Recv Pkts Err
---------------------------------------------------------------------
Channel group 20
Te4/2 21 18 0 0 0 0 0
Router# show lacp 20 internal
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 20
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Te4/2 SA bndl 32768 0x5 0x5 0x42 0x3D
Router# show lacp 20 neighbor
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 20 neighbors
Partner's information:
Partner Partner LACP Partner Partner Partner Partner Partner
Port Flags State Port Priority Admin Key Oper Key Port Number Port State
Te4/2 SA 32768 0011.2026.7300 11s 0x1 0x14 0x3C
Router# show lacp 20 countersLACPDUs Marker Marker Response LACPDUs Port Sent Recv Sent Recv Sent Recv Pkts Err ------------------------------------------------------------------------------- Channel group: 20 Te4/2 26 31 0 0 0 0 0Router# show lacp sys-id
32768,0005.9b2e.18e0
Display Manual Load Balancing Configuration
Router# show ethernet service instance load-balanceManually Assigned Load-Balancing Status for Port-channel1 Link ID 1: TenGigabitEthernet4/1 (Active) Backup: Link ID 2 TenGigabitEthernet3/2 Service instances: 10 Link ID 2: TenGigabitEthernet3/2 (Active) Backup: Link ID 1 TenGigabitEthernet4/1 Service instances: 20Router# show ethernet service instance platform
Displays the port channel EFPs that are currently using the manual or platform load balancing and the egress link.
EFP id: 10 Interface Port-channel1
Load balancing type: Manual
Associated Egress Interface: TenGigabitEthernet4/1
EFP id: 20 Interface Port-channel1
Load balancing type: Manual
Associated Egress Interface: TenGigabitEthernet3/2
EFP id: 10 Interface Port-channel2
Load balancing type: Manual
Associated Egress Interface: TenGigabitEthernet5/1
EFP id: 20 Interface Port-channel2
Load balancing type: Platform
Associated Egress Interface: TenGigabitEthernet5/1
Interactions of LAG with Other Features
LAG interacts with the following features:
LAG with EVC
EFPs can be configured on a channel group. The traffic, carried by the EFPs, is load balanced across the member links. Ingress traffic for a single EVC can arrive on any member of the bundle. All egress traffic for an EFP uses only one of the member links. The load balancing is achieved by distributing EFPs between the member links. The EFPs on a channel group are grouped and each group is associated with a member link. In the default load balancing mechanism, there is no control over how the EFPs are distributed together, and sometimes the EFP distribution is not ideal. The manual load balancing mechanism can be alternatively used to control the EFP grouping.
When you configure a physical port as part of a channel group, you cannot configure EVCs under that physical port.
LAG can be configured for both point–to–point and point–to–multipoint bridge domains.
LAG with MPLS
LAG can be an attachment circuit for MPLS services.
The following example shows how the Ethernet LAG can connect to MPLS.
Router# enable Router# configure terminal Router(config)# interface port-channel 10 Router(config-if)# service instance 10 ethernet Router(config-if-srv)# xconnect 10.0.0.2 999 encapsulation MPLS Router(config-if-srv)# exit
LAG with QoS
LAG with IGMP Snooping
LAG with REP
REP is not supported on member links that are part of a channel group.