You can list the trunk type and group for all ports on the switch or for selected ports. You can also list LACP-only status information for LACP-configured ports.
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![[CAUTION: ]](images/caution.gif) |
CAUTION: To avoid broadcast storms or loops in your network while configuring a trunk, first disable or disconnect all ports you want to add to or remove from the trunk. After you finish configuring the trunk, enable or re-connect the ports. |
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Syntax
show trunks<PORT-LIST>Omitting the
<PORT-LIST>parameter results in a static trunk data listing for all LAN ports in the switch.
Static trunk group
In a switch where ports A4 and A5 belong to Trunk 1 and ports A7 and A8 belong to Trunk 2, you have the options shown in figures Listing specific ports belonging to static trunks and Example of a show trunk listing without specifying ports for displaying port data for ports belonging to static trunks.
Using a port list specifies, for switch ports in a static trunk group, only the ports you want to view. In this case, the command specifies ports A5 through A7. However, because port A6 is not in a static trunk group, it does not appear in the resulting listing:
The show trunks command in the above example includes a port list, and thus shows trunk group information only for specific ports that have membership in a static trunk. In Example of a show trunk listing without specifying ports, the command does not include a port list, so the switch lists all ports having static trunk membership.<PORT-LIST>
Example of a show trunk listing without specifying ports
HP Switch> show trunks Load Balancing Port | Name Type | Group Type ---- + ----------------------- --------- + ----- ----- 4 | Print-Server-Trunk 10/100TX | Trk1 Trunk 5 | Print-Server-Trunk 10/100TX | Trk1 Trunk 7 | 10/100TX | Trk2 Trunk 8 | 10/100TX | Trk2 Trunk
Syntax
Example of a show LACP listing
Ports A1 and A2 have been previously configured for a static LACP trunk. (For more on the Active parameter, see LACP port status data.)
HP Switch> show lacp
LACP
LACP Trunk Port LACP Admin Oper
Port Enabled Group Status Partner Status Key Key
---- ------- ------- ------- ------- ------- ------ ------
Al Active Trkl Up Yes Success 0 250
A2 Active Trkl Up Yes Success 0 250
A3 Active A3 Down No Success 0 300
A4 Passive A4 Down No Success 0 0
A5 Passive A5 Down No Success 0 0
A6 Passive A6 Down No Success 0 0
For a description of each of the above-listed data types, see LACP port status data.
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![[IMPORTANT: ]](images/important.gif) |
IMPORTANT: Configure port trunking before you connect the trunked links between switches. Otherwise, a broadcast storm could occur. If you need to connect the ports before configuring them for trunking, you can temporarily disable the ports until the trunk is configured. |
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Syntax
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CAUTION: Removing a port from a trunk can create a loop and cause a broadcast storm. When you remove a port from a trunk where spanning tree is not in use, HP Switch recommends that you first disable the port or disconnect the link on that port. |
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Syntax
no trunk <PORT-LIST>
Removes the specified ports from an existing trunk group.
Example
To remove ports C4 and C5 from an existing trunk group:
(HP_Switch_name#) no trunk c4-c5
A LAN broadcast storm arises when an excessively high rate of broadcast packets flood the LAN. Occurrence of LAN broadcast storm disrupts traffic and degrades network performance. To prevent LAN traffic from being disrupted, the use of fault-finder commands trigger a port disablement when a broadcast storm is detected. Commands can be used only to support broadcast traffic and not multicast and unicast types of traffic.
The waiting period range for re-enabling ports is 0 to 604800 seconds. The default waiting period to re-enable a port is zero which prevents the port from automatic re-enabling.
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![[NOTE: ]](images/note.gif) |
NOTE: Avoid port flapping when choosing the waiting period by considering the time to re-enable carefully. |
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Use the following commands to configure the broadcast-storm on a port.
Syntax
[no]
fault-finder broadcast-storm [ethernet]<PORT-LIST>action [warn | warn-and-disable][<seconds>percent]<Percent>| pps<rate>To remove the current configuration of broadcast-storm on a port, use:
Syntax
Configuration example 1
Syntax
HP Switch(config)# fault-finder broadcast-storm [ethernet]<A1>action [warn-and-disable]<65535>< percent 10>
Configuration example 2
Configuration example 3
Use the following command to display the broadcast-storm-control configuration.
Syntax
Show example 1
| Port | Bcast storm | Port status | Rising threshold | Action | Disable timer | Disable timer left |
|---|---|---|---|---|---|---|
| A1 | Yes | Down | 10% | warnanddisable | 65535 |
Show example 2
| Port | Bcast storm | Port status | Rising threshold | Action | Disable timer | Disable timer left |
|---|---|---|---|---|---|---|
| A1 | Yes | Down | 200 pps | warnanddisable | 10 | 9 |
Show example 3
Show example 4
Depending on the configuration of broadcast storm control several of the following messages can be logged:
The following messages can be logged after the port is enabled:
Event log
l 01/01/90 00:35:20 00025 ip: DEFAULT_VLAN: ip address 10.100.38.231/24 configured on vlan 1 l 01/01/90 00:35:20 00083 dhcp: updating IP address and subnet mask l 01/01/90 00:35:05 00076 ports: port A1 is now on-line l 01/01/90 00:35:02 00900 ports: port A1 timer (71) has expired W 01/01/90 00:34:13 00026 ip: DEFAULT_VLAN: ip address 10.100.38.231/24 removed from vlan 1 l 01/01/90 00:34:12 00077 ports: port A1 is now off-line l 01/01/90 00:34:12 00898 ports: Fault Finder(71) has disabled port A1 for 5seconds M 01/01/90 00:34:12 02673 FFI: port A1-Port disabled by Fault-finder. W 01/01/90 00:34:12 02676 FFI: port A1-Excessive Broadcasts. Broadcast-storm control threshold 4 percent exceeded. ---- Reverse event Log listing: Events Since Boot ---- I 01/01/90 00:08:44 00025 ip: DEFAULT_VLAN: ip address 10.100.38.231/24 configured on vlan 1 I 01/01/90 00:08:44 00083 dhcp: updating IP address and subnet mask I 01/01/90 00:08:11 00076 ports: port A1 is now on-line I 01/01/90 00:08:08 00900 ports: port A1 timer (71) has expired W 01/01/90 00:06:29 00026 ip: DEFAULT_VLAN: ip address 10.100.38.231/24 removed from vlan 1 I 01/01/90 00:06:28 00077 ports: port A1 is now off-line I 01/01/90 00:06:28 00898 ports: Fault Finder(71) has disabled port A1 for 100 seconds M 01/01/90 00:06:28 02673 FFI: port A1-Port disabled by Fault-finder. W 01/01/90 00:06:28 02675 FFI: port A1-Excessive Broadcasts. Broadcast-storm control threshold 10 pps exceeded.
An individual trunk can have up to eight links, with additional standby links if you are using LACP. You can configure trunk group types as follows:
Syntax
interface <PORT-LIST> lacp active
Configures<PORT-LIST> as LACP active. If the ports at the other end of the links on <PORT-LIST> are configured as LACP passive, this command enables a dynamic LACP trunk group on <PORT-LIST>.
Example
This example uses ports C4 and C5 to enable a dynamic LACP trunk group.
(HP_Switch_name#) interface c4-c5 lacp active
To remove a port from dynamic LACP trunk operation, you must turn off LACP on the port. (On a port in an operating, dynamic LACP trunk, you cannot change between LACP Active and LACP passive without first removing LACP operation from the port.)
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CAUTION: Unless spanning tree is running on your network, removing a port from a trunk can result in a loop. To help prevent a broadcast storm when you remove a port from a trunk where spanning tree is not in use, HP recommends that you first disable the port or disconnect the link on that port. |
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Syntax
no interface <PORT-LIST> lacp
Removes <PORT-LIST> from any dynamic LACP trunk and returns the ports in <PORT-LIST> to passive LACP.
Example
Port C6 belongs to an operating, dynamic LACP trunk. To remove port C6 from the dynamic trunk and return it to passive LACP, do the following:
(HP_Switch_name#) no interface c6 lacp (HP_Switch_name#) interface c6 lacp passive
In the above example, if the port on the other end of the link is configured for active LACP or static LACP, the trunked link will be re-established almost immediately.
During dynamic link aggregation using LACP, ports with the same key are aggregated as a single trunk.
Syntax
Enabling LACP and configuring an LACP key
(HP_Switch_name#) int A2-A3 lacp active
(HP_Switch_name#) int A2-A3 lacp key 500
(HP_Switch_name#) show lacp
LACP
LACP Trunk Port LACP Admin Oper
Port Enabled Group Status Partner Status Key Key
---- ------- ------- ------- ------- ------- ------ ------
A2 Active A2 Down No Success 500 500
A3 Active A3 Down No Success 500 500
Interface configured with a different LACP key
(HP_Switch_name#) int A5 lacp active
(HP_Switch_name#) int A5 lacp key 250
HP Switch> show lacp
LACP
LACP Trunk Port LACP Admin Oper
Port Enabled Group Status Partner Status Key Key
---- ------- ------- ------- ------- ------- ------ ------
Al Active Dyn1 Up Yes Success 100 100
A2 Active Dyn1 Up Yes Success 100 100
A3 Active Dyn1 Up Yes Success 100 100
A4 Active Dyn1 Up Yes Success 100 100
A5 Active A5 Up No Success 250 250