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Chapter 18      Managing Carrier Ethernet Configurations
  Working with Ethernet Link Aggregation Groups
Working with Ethernet Link Aggregation Groups
Ethernet link aggregation groups (LAGs) provide the ability to treat multiple switch ports as one switch 
port. The port groups act as a single logical port for high-bandwidth connections between two network 
elements. A single link aggregation group balances the traffic load across the links in the channel. 
LAG links are discovered automatically for devices that support LAG technology and use VNEs that 
model Link Aggregation Control Protocol (LACP) attributes. 
You can create static links between Ethernet LAGs by choosing a LAG and the desired port channel for 
the A or Z side as described in Adding a Static Link When a Network Link is Missing, page 4-13.
If a physical link within the link aggregation group fails, the following actions occur:
Traffic that was previously carried over the failed link is moved to the remaining links. 
Most protocols operate over single ports or aggregated switch ports and do not recognize the 
physical ports within the port group. Provider Bridge Whether the current instance of the protocol is in 802.1ad mode: 
True or False. 
Bridge Address Bridge identifier for the current switch. 
BPDUs Sent Number of BPDUs sent. 
Port Identifier Port identifier for the interface.
Reversion Control Enabled Whether reversion control is enabled: True or False.
External Cost External path cost on the current port.
Values range from 1 to 200000000. 
Hello Time Current hello time (in seconds)
Port Active Whether or not the port is active: True or False.
Instances Table
Instance ID Access gateway instance identifier. 
VLAN ID VLAN identifiers. 
Cost Path cost for this instance. 
Bridge Priority Priority associated with current bridge.
Root Bridge Priority Priority associated with the root bridge.
Root Bridge Address Address of the root bridge. 
Port Priority Priority of the interface for this instance. 
Topology Changes Number of times the topology has changed for this instance. 
Access GW External Cost External root cost of this instance.
Table 18-10 Access Gateway Instance Properties (continued)
Field Description 
						

							  
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Chapter 18      Managing Carrier Ethernet Configurations
  Working with Ethernet Link Aggregation Groups
An aggregation service alarm is generated. 
The aggregation service alarm indicates the percentage of links within the aggregation that have 
failed. For example, if an Ethernet link aggregation group contains four Ethernet links and one fails, 
the aggregation service alarm indicates that 25% of the links are down.
Viewing Ethernet LAG Properties
To view a device’s Ethernet LAG properties, the device must be configured to receive SNMP traps as 
described in the Cisco Prime Network 4.3.2 Administrator Guide. To view properties for Ethernet link 
aggregation groups:
Step 1In the Vision client, double-click the device with the link aggregation group you want to view.
Step 2In the Inventory window, choose Logical Inventory > Ethernet Link Aggregation.
The link aggregation properties are displayed as shown in Figure 18-9.
Figure 18-9 Ethernet Link Aggregation in Logical Inventory
Table 18-11 describes the aggregation group properties that are displayed in the Data Link Aggregations 
table. 
Table 18-11 Data Link Aggregations Table
Field Description
ID Aggregation identifier. Double-click the entry to view the properties for 
that aggregation.
Type Aggregation group type: Ethernet Channel or IEEE 802.3 AD LAG.
Group Number Aggregation group number. 
Bandwidth Aggregation bandwidth. 
						

							  
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Chapter 18      Managing Carrier Ethernet Configurations
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Step 3To view properties for a specific aggregation, double-click the group identifier. 
The information that is displayed depends on the type of aggregation:
For Ethernet Channel aggregations, see Table 18-12. 
For IEEE 802.3 AD aggregations, see Table 18-13.  Aggregation Control 
ProtocolAggregation control protocol: Manual, Link Aggregation Control 
Protocol (LACP), or Port Aggregation Protocol (PagP).
Status Aggregation status: Up or Down. 
MAC Address Aggregation MAC address. 
Link Type The type of ethernet bundle link, namely ICL and transport.
ICL link type represents the ethernet link bundle between Cisco 
ASR 9000 device and satellite chassis or between two satellite 
chassis.
Transport link type represents the ethernet link bundle between two 
Cisco ASR 9000 devices.
Non Revertive  Specifies the currently active but a lower priority port to remain active 
port even after a higher priority port is capable of being operational (if 
non revertive is enabled). 
By default, non revertive is disabled.
Load Balance Load balance type which uses Source and Destination MAC address, 
Source IP address, or Destination IP address.
Table 18-11 Data Link Aggregations Table (continued)
Field Description
Table 18-12 LAG Ethernet Channel Properties
Field Description
Group Number Aggregation group number. 
Bandwidth Aggregation bandwidth in b/s.
Control Protocol Aggregation control protocol: Manual, Link Aggregation Control Protocol (LACP), or Port 
Aggregation Protocol (PagP).
MAC Address Aggregation MAC address.
Administrative State Aggregation administrative status: Up or Down.
Operational State Aggregation operational status: Up or Down.
Adjacent Adjacent group, hyperlinked to the group in logical inventory. 
mLACP Properties mLACP properties are displayed if the aggregation group is associated with an ICCP redundancy 
group. 
ICCP Redundancy 
GroupICCP redundancy group associated with this aggregation group, hyperlinked to the relevant entry 
in logical inventory.
mLACP Role Role of the LAG in the redundancy group: Active or Standby. 
mLACP Operational 
System MACMAC address used in a dual-homed environment that is selected by ICCP from one of the 
configured system MAC addresses for one of the points of attachment (PoAs). 
						

							  
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mLACP Operational 
System PriorityPriority used in a dual-homed environment that is selected by ICCP from the configured system 
priority on one of the PoAs. 
mLACP Failover 
OptionConfigured mLACP failover mode: Revertive or Nonrevertive.
mLACP Max Bundle Maximum number of links allowed per bundle. 
Aggregated Ports Table
ID Aggregated port identifier, hyperlinked to the interface in physical inventory.
Type Aggregation type, such as Layer 2 VLAN. 
Mode VLAN mode, such as Trunk.
Native VLAN ID VLAN identifier (VID) associated with this VLAN. The range of VLANs is 1 to 4067.
VLAN Encapsulation 
Ty p eType of encapsulation configured on the VLAN, such as IEEE 802.1Q.
Allowed VLANs List of VLANs allowed on this interface.
VLAN Encapsulation 
Admin Type VLAN administration encapsulation type, such as IEEE 802.1Q.
Subinterfaces Table 
Address IP address of the subinterface.
Mask Subnet mask applied to the IP address.
VLAN Type Type of VLAN, such as Bridge or IEEE 802.1Q.
Operational State Operational state of the subinterface: Up or Down.
VLAN ID VLAN identifier. 
Inner VLAN CE-VLAN identifier.
IP Interface IP interface configured as part of the subinterface, hyperlinked to the routing entity or VRF in 
logical inventory.
VRF Name VRF associated with the subinterface. 
Is MPLS Whether the subinterface is enabled for MPLS: True or False.
This column is displayed when at least one interface is MPLS-enabled.
Tunnel Edge Whether this is a tunnel edge: True or False.
VC Virtual circuit identifier, hyperlinked to the VC Table when the subinterface is configured for ATM 
VC.
Binding Hyperlinked entry to the specific bridge in logical inventory. 
EFPs Table
EFP ID EFP identifier.
Operational State EFP operational state: Up or Down.
VLAN  VLAN associated with this EFP. 
Inner VLAN CE-VLAN identifier.
Translated VLAN Translated, or mapped, VLAN identifier. 
Translated Inner VLAN Translated, or mapped, inner VLAN identifier. 
Table 18-12 LAG Ethernet Channel Properties (continued)
Field Description 
						

							  
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  Working with Ethernet Link Aggregation Groups
Binding Hyperlinked entry to the specific bridge in logical inventory. 
Description Description for the EFP. 
Table 18-12 LAG Ethernet Channel Properties (continued)
Field Description 
						

							  
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  Working with Ethernet Link Aggregation Groups
Table 18-13 LAG IEEE 802.3 AD Properties
Field Description
Group Number Aggregation group number. 
Bandwidth Aggregation bandwidth.
Control Protocol Aggregation control protocol: Manual, Link Aggregation Control 
Protocol (LACP), or Port Aggregation Protocol (PagP).
MAC Address Aggregation MAC address.
Administrative State Aggregation administrative status: Up or Down.
Operational State Aggregation operational status: Up or Down.
Dot3ad Agg Partner System Priority Priority of the partner system. 
Dot3ad Agg MAC Address Aggregation MAC address.
Adjacent Displays the adjacent ethernet link aggregation for the selected Data 
Link Aggregation ID.
Dot3ad Agg Actor Admin Key Actor administrative key.
Dot3ad Agg Actor System Priority Actor system priority.
Dot3ad Agg Partner Oper Key Partner operational key.
Dot3ad Agg Actor Oper Key Actor operational key.
Dot3ad Agg Collector Max Delay Maximum delay (in microseconds) for either delivering or discarding a 
received frame by the frame collector. 
Dot3ad Agg Actor System ID Actor system identifier, in the form of a MAC address. 
Dot3ad Agg Partner System ID Partner system identifier, in the form of a MAC address.
mLACP PropertiesmLACP properties are displayed if the aggregation group is associated 
with an ICCP redundancy group. 
ICCP Redundancy Group ICCP redundancy group associated with this aggregation group, 
hyperlinked to the relevant entry in logical inventory.
mLACP Role Role of the LAG in the redundancy group: Active or Standby. 
mLACP Operational System MAC MAC address used in a dual-homed environment that is selected by 
ICCP from one of the configured system MAC addresses for one of the 
points of attachment (PoAs).
mLACP Operational System Priority Priority used in a dual-homed environment that is selected by ICCP from 
the configured system priority on one of the PoAs. 
mLACP Failover Option Configured mLACP failover mode: Revertive or Nonrevertive.
mLACP Max Bundle Maximum number of links allowed per bundle. 
Aggregated Ports Table
ID Port identifier, hyperlinked to the interface in physical inventory.
Type Type of VLAN, such as Layer 2 VLAN.
Discovery Protocols Discovery protocols used on this port. 
						

							  
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Subinterfaces Table 
Address IP address of the subinterface.
Mask Subnet mask applied to the IP address.
VLAN Type Type of VLAN, such as Bridge or IEEE 802.1Q. 
Operational State Operational state of the subinterface: Up or Down.
VLAN ID VLAN identifier. 
Inner VLAN CE-VLAN identifier.
IP Interface IP interface configured as part of the subinterface, hyperlinked to the 
routing entity or VRF in logical inventory.
VRF Name VRF associated with the subinterface. 
VC Virtual circuit identifier, hyperlinked to the VC Table when the 
subinterface is configured for ATM VC.
Binding Hyperlinked entry to the specific bridge in logical inventory. 
EFPs Table
EFP ID EFP identifier.
Operational State EFP operational state: Up or Down.
VLAN  VLAN associated with this EFP. 
Inner VLAN CE-VLAN identifier.
Translated VLAN Translated, or mapped, VLAN identifier. 
Translated Inner VLAN Translated, or mapped, inner VLAN identifier. 
Binding Hyperlinked entry to the specific bridge in logical inventory. 
Description Description for the EFP. 
LACP Port Entries
Aggregated Port Port on which the aggregation is configured, hyperlinked to the entry in 
physical inventory.
Dot3ad Agg Port Partner Admin Port PriorityAdministrative port priority for the partner.
Dot3ad Agg Port Partner Admin Key Administrative key for the partner port. 
Dot3ad Agg Port Partner Oper Port Priority Priority assigned to the aggregation port by the partner. 
Dot3ad Agg Port Actor Oper State Local operational state for the port. 
Dot3ad Agg Port Actor Admin State Local administrative state as transmitted by the local system in LACP 
data units (LACPDUs). 
Dot3ad Agg Port Selected Agg ID Selected identifier for the aggregation port.
Dot3ad Agg Port Partner Oper Key Operational key for the partner port.
Dot3ad Agg Port Partner Admin State Partner administrative state. 
Dot3ad Agg Port Actor Port Priority Priority assigned to the local aggregation port. 
Dot3ad Agg Port Partner Oper State Partner administrative state as transmitted by the partner in the most 
recently transmitted LAPCDU. 
Dot3ad Agg Port Attached Agg IDIdentifier of the aggregator that the port is attached to.
Table 18-13 LAG IEEE 802.3 AD Properties (continued)
Field Description 
						

							  
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  Viewing mLACP Properties
Viewing mLACP Properties
The Vision client supports the discovery of Multichassis LACP (mLACP) configurations on devices 
configured for them, and displays mLACP configuration information, such as redundancy groups and 
properties, in inventory. 
To view mLACP properties: 
Step 1In the Vision client, double-click the element configured for mLACP. 
Step 2In the Inventory window, choose Logical Inventory > ICCP Redundancy. 
In response, the Vision client lists the Inter-Chassis Communication Protocol (ICCP) redundancy groups 
configured on the device as shown in Figure 18-10. 
Figure 18-10 ICCP Redundancy in Logical Inventory 
Dot3ad Agg Port Actor Admin Key Administrative key for the local port. 
Dot3ad Agg Port Actor Port Number assigned to the local aggregation port.
Dot3ad Agg Port Partner Oper Port Number assigned to the aggregation port by the partner.
Dot3ad Agg Port Actor Oper Key Operational for the local port.
Dot3ad Agg Port Partner Admin Port Administrative value of the port for the partner.
Table 18-13 LAG IEEE 802.3 AD Properties (continued)
Field Description 
						

							  
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  Viewing mLACP Properties
Table 18-14 describes the information displayed in the ICCP Redundancy Groups table. 
Step 3To view additional information about an ICCP redundancy group, do either of the following:
In the logical inventory window navigation pane, choose Logical Inventory ICCP 
Redundancy >ICCP-group. 
In the logical inventory content pane, right-click the required group in the ICCP Redundancy Groups 
table and choose Properties. 
The ICCP Redundancy Group Properties window is displayed with the Backbone Interfaces and Data 
Link Aggregations tabs as shown in Figure 18-11.
Figure 18-11 ICCP Redundancy Group Properties Window Table 18-14 ICCP Redundancy Groups in Logical Inventory
Field Description
Group Number ICCP group identifier.
Peer Monitoring Option Method used to monitor the peer: BFD or IP Reachability 
Monitoring.
Member IP Address IP address of the neighbor PoA device.
Member Device Name Name of the neighbor PoA device.
mLACP Node ID Identifier used by this member of the mLACP redundancy group.
mLACP Configured System 
MACSystem MAC address of the redundancy group advertised to other 
members of the mLACP redundancy group and used for arbitration. 
mLACP Configured System 
PrioritySystem priority advertised to other mLACP members of the 
redundancy group.  
						

							  
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  Viewing mLACP Properties
Table 18-15 describes the information available in the ICCP Redundancy Group Properties window. 
Step 4To view additional mLACP properties, double-click the entry for the required link aggregation group in 
the Data Link Aggregations tab.
mLACP information is displayed in the Link Aggregation Group Properties window, as described in the 
following tables:
Table 18-12—LAG Ethernet Channel Properties
Table 18-13—LAG IEEE 802.3 AD Properties
Table 18-15 ICCP Redundancy Group Properties Window
Field Description
Group Number ICCP group identifier.
Peer Monitoring Option Method used to monitor the peer: BFD or IP Reachability 
Monitoring.
Member IP Address IP address of the neighbor PoA device.
Member device name Name of the neighbor PoA device.
mLACP Node ID Identifier used by this member of the mLACP redundancy group. 
mLACP Configured System 
MACSystem MAC address of the redundancy group advertised to other 
members of the mLACP redundancy group and used for arbitration. 
mLACP Configured System 
PrioritySystem priority advertised to other mLACP members of the 
redundancy group. 
Backbone Interfaces Tab
ID Backbone interface defined for the redundancy group, hyperlinked 
to the relevant entry in logical inventory. 
Status Status of the backbone interface: Up, Down, or Unknown.
Data Link Aggregations Tab
ID Link aggregation group associated with the redundancy group, 
hyperlinked to the relevant entry in logical inventory. 
Type Aggregation group type: Ethernet Channel or IEEE 802.3 AD LAG. 
Group Number Aggregation group number.
Bandwidth Aggregation bandwidth.
Aggregation Control 
ProtocolAggregation control protocol: Manual, LACP, or PAgP.
Status Aggregation status: Up or Down.
MAC Address Aggregation MAC address.