Media Redundancy Protocol

Information About MRP

Media Redundancy Protocol (MRP), defined in International Electrotechnical Commission (IEC) standard 62439-2, provides fast convergence in a ring network topology for Industrial Automation networks. MRP Media Redundancy Manager (MRM) defines its maximum recovery times for a ring in the following range: 10 ms, 30 ms, 200 ms and 500 ms.


Note


The default maximum recovery time on the Cisco IE switch is 200 ms for a ring composed of up to 50 nodes. You can configure the switch to use the 30 ms or the 500 ms recovery time profile as described in Configuring MRP Manager. The 10 ms recovery time profile is not supported.

MRP is supported on the following switches:

  • Cisco Catalyst IE3x00 Rugged Series Switches (IE3200, IE3300, and IE3400)

  • Cisco Catalyst IE3400 Heavy Duty Series Switches

  • Cisco Catalyst IE3100 Rugged Series Switches (IE3100 and IE3105)


Note


MRP is not supported on Cisco Catalyst ESS3300 Switches.


MRP operates at the MAC layer and is commonly used in conjunction with the PROFINET standard for industrial networking in manufacturing.

MRP Modes

There are two modes of MRP supported on the switch; however, only one mode can be enabled to operate on the switch at any given time:

  • PROFINET MRP mode—Deployed in a PROFINET environment, the switch is added and managed by Siemens Totally Integrated Automation (TIA) Framework. This is the default MRP mode if the MRP manager or client license is activated through the web interface or command line.


    Note


    When managing the switch with TIA, do not use the CLI or WebUI to configure MRP.


  • MRP Command-line interface (CLI) mode—This mode is managed by the Cisco IOS CLI and WebUI, a web-based user interface (UI).


    Note


    When managing the switch in MRP CLI mode, you cannot download the MRP configuration from Siemens STEP7/TIA.


Protocol Operation

In an MRP ring, the MRM serves as the ring manager, while the Media Redundancy Clients (MRCs) act as member nodes of the ring. Each node (MRM or MRC) has a pair of ports to participate in the ring. The MRM initiates and controls the ring topology to react to network faults by sending control frames on one ring port over the ring and receiving them from the ring over its other ring port, and conversely in the other direction. An MRC reacts to received reconfiguration frames from the MRM and can detect and signal link changes on its ring ports.

On Cisco Catalyst IE3x00 and IE3100 Rugged Series and IE3400 Heavy-Duty Switches, certain nodes or all nodes in the ring can also be configured to start as a Media Redundancy Automanager (MRA). MRAs select one MRM among each other by using a voting protocol and a configured priority value. The remaining MRAs transition to the MRC role.

All MRM and MRC ring ports support the following states:

  • Disabled: Ring ports drop all received frames.

  • Blocked: Ring ports drop all received frames except MRP control frames and some standard frames, for example, LLDP.

  • Forwarding: Ring ports forward all received frames.

  • Not Connected: The link is physically down or disconnected. (This state differs from the Disabled state, in which the MRP Port is manually disabled through software.)

During normal operation, the network operates in the Ring-Closed state (see figure below). To prevent a loop, one of the MRM ring ports is blocked, while the other port is forwarding. Most of the time, both ring ports of all MRCs are in the forwarding state. With this loop avoidance, the physical ring topology becomes a logical stub topology.

In the figure, note the following details about the two rings, left and right:

  • Left Ring: The connection (small blue square, top) on the MRM is in a blocked state (as shown by the two parallel lines) because no ports are disconnected.

  • Right Ring: Two MRC connections (left and center small white squares) are in the disabled state because the link between them is broken, as marked by a red “x”.

Figure 1. MRP Ring States

If a network failure occurs:

  • The network shifts into the Ring-Open state.

  • In the case of failure of a link connecting two MRCs, both ring ports of the MRM change to the forwarding state, the MRCs adjacent to the failure have a disabled and a forwarding ring port, and the other MRCs have both ring ports forwarding.

In the Ring-Open state, the network logical topology becomes a stub.

Layer 2 Ethernet frames will be lost during the time required for the transition between these two ring states. The MRP protocol defines the procedures to automatically manage the switchover to minimize the switchover time. A recovery time profile, composed of various parameters, drives the MRP topology convergence performance. The 200 ms profile supports a maximum recovery time of 200 ms.

MRP uses three types of control frames:

  • To monitor the ring status, MRM regularly sends test frames on both ring ports.

  • When MRM detects failure or recovery, it sends TopoChange frames on both ring ports.

  • When MRC detects failure or recovery on a local port, it sends LinkChange subtype frames, Linkdown and Linkup, to the MRM.

Media Redundancy Automanager (MRA)


Note


MRA can be activated through the CLI or through PROFINET.


If configured to start as a Media Redundancy Automanager (MRA), the node or nodes select an MRM using a voting protocol and configured priority value. The remaining MRAs transition to the MRC role. All nodes must be configured as MRA or MRC. A manually configured MRM and MRA in the same ring is not supported.

The MRA role is not an operational MRP role like MRM or MRC. It is only an administrative, temporary role at device startup, and a node must transition to the MRM role or the MRC role after startup and the MRM is selected though the manager voting process.

MRA functions as follows:

  1. At power on, all MRAs begin the manager voting process. Each MRA begins to send MRP_Test frames on both ring ports. The MRP_Test frame contains the MRA's priority value. The remote manager's priority value contained in the received MRP_Test frames are compared with the MRA's own priority. If its own priority is higher than the received priority, the MRA sends a negative test manager acknowledgement (MRP_TestMgrNAck) frame, along with the remote manager's MAC address.

  2. If the receiving MRA receives an MRP_TestMgrNAck with its own MAC address, the receiving MRA initiates the transition into the client (MRC) role.

  3. The MRP_TestPropagate frame informs other MRA devices in the client role about the role change and the new higher priority manager. The clients receiving this frame update their higher priority manager information accordingly. This ensures that clients remain in the client role if the monitored higher priority manager role changes.

Multiple MRP Rings

In an Industrial Ethernet network, an MRP ring in a cell/area is a sub-ring of the access layer. You can connect multiple MRP rings, which you can then aggregate into the distribution layer.


Note


The MRP feature license requirement is removed in Cisco IOS XE 17.7.1 and later.


You can configure up to three rings, and you can configure the switch as either automanager or client.

MRP-STP Interoperability

MRP works with Spanning Tree Protocol (STP) to prevent unwanted broadcast loops in the event that a user accidentally connects a device that does not participate in the MRP ring. In a network operating with MRP and STP, spanning tree BPDUs are not sent on MRP-enabled ports. If ports are unconfigured from an MRP ring, then the ports are added to the spanning tree.

MRP-STP interoperability is supported for both PROFINET MRP mode and MRP CLI mode, and functions without additional CLI configuration.

Prerequisites

  • Before configuring a ring, in Cisco IOS XE releases 17.6.x and earlier, ensure that you have enabled MRP Manager/Client licenses. These can be obtained from Smart licensing account, and by following the SL or SLR process to activate the feature licenses.

  • Use of MRP in Cisco IOS XE 17.7.1 and later is available with the Networking Essentials license.

  • Because MRP is deployed in a physical Ring topology, before configuring or unconfiguring the MRP feature, it is advised to leave one physical connection between two nodes in each ring open by either issuing a shut command on the connecting interfaces or physically removing the cable to avoid any network storms. After you have properly configured all MRCs and MRMs, issue a no shut command on the port or re-connect the cable between the nodes.

  • In Cisco IOS XE releases 17.6.x and earlier, activate the MRP License before you configure the MRP protocol.

  • Determine the MRP configuration on the switch: MRA, or MRC.

  • When the network is managed by SIMATIC TIA or STEP7, ensure that the basic PROFINET connection is on.

  • The MRP default VLAN is 1. To use a non-default VLAN, you must configure the PROFINET VLAN ID before assigning it to the MRP configuration.

Guidelines and Limitations

  • MRP is supported on Cisco Catalyst IE3x00 and IE3100 Rugged Series and IE3400 Heavy Duty Series Switches. MRP is not supported on ESS3300 Switches.

  • In Cisco IOS XE 17.7.1 and later, the MRP feature is available as a part of Network Essentials Licensing. In releases prior to Cisco IOS XE 17.7.1, use of MRP requires a feature license that must be activated using the Cisco switch CLI.

  • By default, Profinet MRP mode is enabled on Cisco Catalyst IE3x00 switches. You can configure MRP, including the MRP role, using the Cisco switch CLI only after you disable the PROFINET MRP function using the Cisco switch CLI.


    Note


    Profinet MRP mode is not supported by default on Cisco Catalyst IE3x00 switches. You must use the Cisco switch CLI for configuration.


    When PROFINET MRP is enabled, use STEP7 and TIA to configure MRP, including the MRP role.

  • To avoid Smart License registration failure, ensure that the NTP configuration and the device clock are in sync.

  • With the MRP manager license (Cisco IOS XE 17.6.x and earlier), you can configure up to three rings on a device (each MRP instance can be manager or client), with a manager instance for each ring.

  • Support for multiple MRP rings is available only through the CLI or WebUI.

  • The switch supports up to 50 MRCs per ring.

  • MRP cannot run on the same interface (port) as Resilient Ethernet Protocol (REP), Spanning Tree Protocol (STP), Flex Links, macsec, or Dot1x.

  • STP does not run on MRP segments. MRP interfaces drop all STP BPDUs.

  • For access ports, you must specifically configure switchport mode access and switchport access vlan x commands in the MRP interface.

  • MRP interfaces come up in a forwarding state and remain in a forwarding state until notified that it is safe to block. The MRP ring state changes to Ring-Closed.

  • MRP ports cannot be configured as any of these port types: SPAN destination port, Private VLAN port, or Tunnel port. Additionally, when operating in PROFINET mode, you cannot configure MRP ports as Trunk ports.

  • MRP is not supported on EtherChannels or on an individual port that belongs to an EtherChannel.

  • Each MRP ring can have one MRP VLAN. The VLAN must be different for each ring in a device to avoid traffic flooding.

PROFINET MRP Mode Only

  • PROFINET MRP mode is supported on IE3x00 Series Switches; it is not supported on IE3100 Rugged Series Switches.

  • Ensure that you configure the correct ring ID on client and manager. Ring ID configuration is not automatically validated by the switch.

  • You can configure only one MRP ring in PROFINET MRP mode.


    Note


    The number of MRP rings displayed in the show profinet status command output indicates the maximum number of rings allowed for configuration through the CLI and not through PROFINET.


  • In PROFINET MRP, which is managed by STEP7 and TIA, only Layer 2 access ports are supported because PROFINET does not have the concept of VLAN tagging.

  • The 10 ms profile is not supported.

  • When using PROFINET MRP mode, we recommend setting the LLDP timer to 5 ms or 10 ms to ensure PROFINET can see neighbor devices and to avoid a Siemens PLC timeout.

  • When a new pluggable module GSD file is installed in TIA/ STEP7, you must recreate the project in TIA/Step7. The existing project, which was created using the old GSD file, will display an error when you attempt to select the new GSD file for the same device. This occurs because the combo ports in the pluggable module SKUs were previously defined as fixed ports.

  • You cannot change the role of any node from MRA to MRC after all nodes come up in MRA mode, either by breaking the ring (by shutting the port or physically removing the cable) or manually configuring the role change. If you want an MRP ring configuration with MRA and MRCs, you need to initially configure only one node as MRA and the rest as MRCs.

MRP CLI Mode Only

  • After using the CLI to configure the MRP ring, you must attach the MRP ring to a pair of ports that support MRP.

  • Both MRP ports must have the same interface mode (access or trunk).

  • To change an existing MRP ring's configuration (mode), or to change the interface mode of the ring ports between access and trunk, you must first delete the ring and then recreate it with the new configuration.

  • When both MRP ports are in access mode, the access VLANs should match. If the configured MRP VLAN does not match the ports' access VLAN, the MRP VLAN is automatically changed to the MRP ports’ access VLAN.

  • In an MRP ring with two access ports, if the ports do not belong to the same access VLAN when you create the MRP ring or you change the access VLAN for only one of the ports after the MRP ring is created, the MRP ring operation is suspended and a message similar to the following is displayed:

    
    ERROR% The ring 1 ports don't belong to the same access VLAN. The MRP ring will not function until the issue has been fixed
    

    Resolve the issue by configuring the access VLAN to be the same for the two ring ports.

  • The 200 ms standard profile, 500 ms profile, and 30 ms profile are supported. The 10 ms profile is not supported.

  • MRA can be activated through CLI and PROFINET.

Default Settings

  • In Cisco IOS XE 17.6.x and earlier, MRM and MRC licenses are not installed by default. Starting with 17.7.1 a feature license is no longer required for MRP.

  • (Cisco IOS XE 17.6.x and earlier) PROFINET MRP mode is enabled by default when MRM or MRC licenses are enabled.

  • MRP is disabled by default.

  • The default VLAN is 1.

  • Create the non-default VLAN before you assign it to MRP ring 1.

Guidelines and limitations to PROFINET MRP mode configuration

Before configuring the Cisco switch with PROFINET MRP through Siemens TIA or STEP7, ensure the following:

  • PROFINET MRP feature doesn't support MRC role.

  • Use the TIA portal to configure or modify MRA role.

  • Avoid using CLI for configuration when TIA is in use. MRP CLI mode and PROFINET MRP mode are mutually exclusive.

  • If the IE3500 switch is connected to the PROFINET PLC, the output of show profinet status | include Connected should display Yes . If it displays No , the switch is not connected to the PROFINET PLC.

  • Ensure that the GSD file version matches the Cisco IOS release to avoid compatibility issues. For detailed configuration steps, refer to the PROFINET Protocol Configuration Guide.

Install the PROFINET GSD File

The PROFINET MRP GSD file is bundled with the Cisco IOS XE software release. After the switch boots at least one time, the GSD files for the switch are located in a directory called "ProfinetGSD". In this directory, there is a zip file containing all the GSDs for all the switch SKUs. Use the GSD file bundled with the release and included in the ProfinetGSD directory.


Note


Remove the older GSD XML file from TIA 15 or STEP 7 to ensure compatibility with the Cisco IOS software.


Configure PROFINET MRP

This task guides you through configuring PROFINET MRP to ensure proper network operation and redundancy.

Before you begin

Disconnect an MRP Ethernet port from the ring (open ring) to discover all neighboring devices using the LLDP protocol. Perform this step before deploying PROFINET MRP to the network. This approach prevents unnecessary flooding if configuration issues occur.

  • (Optional) Verify Neighbor Discovery with LLDP.

    Use the command show lldp neighbor to confirm all neighbor devices are correctly discovered before continuing with PROFINET MRP setup.

  • Check that the PROFINET status indicates a connected-state .

  • Inspect the MRP ring port status:

    Use the profinet mrp ring 1 command.

Procedure


Step 1

Access the PROFINET Device Discovery (DCP) window.

Open the PROFINET DCP window to identify and manage devices in the network.

Figure 2. PROFINET Device Discovery (DCP) window before configuring MRP

Step 2

Assign PROFINET MRP Manager role and domain name on MRM device.

Figure 3. PROFINET MRP Manager role and MRP domain name

Step 3

Define the PROFINET MRP client and MRP domain name on client devices.

Figure 4. PROFINET MRP and MRP domain on client

Step 4

When using MRA mode, configure all devices and domain details.

Step 5

Configure the PROFINET MRP interfaces on all devices participating in the ring.

Figure 5. PROFINET MRP inerfaces

Step 6

Compile the configuration, and then download it to the PLC device.

Step 7

Verify that all devices are connected and the MRP ring is closed.

Figure 6. PROFINET MRP network configuration diagram

Step 8

Verify on the devices that the MRP ring is closed by using the show profinet mrp ring 1 command:

Ensure that one port is in the Blocked state and the other port is in the Forwarding state.


Managing PROFINET Using Simatic Step 7 or TIA 15 Portal

This section provides an overview of key screens within the TIA portal. It does not provide any configuration details. For details on using the TIA portal, refer to the Siemens Simatic STEP7 user documentation.


Note


MRP automanager in PROFINET mode is supported only in TIA V15.


Figure 7. PROFINET Device Discovery (DCP) Window Before Configuring MRP
Figure 8. Define PROFINET MRP Manager and MRP domain
Figure 9. Define PROFINET MRP Client and MRP Domain
Figure 10. Define PROFINET MRP Interfaces
Figure 11. PROFINET MRP Network Configuration Diagram

Configuring MRP CLI Mode

To configure MRP, configure the node as MRA or MRC, and specify the two MRP ports. With the mrp-manager license, you can configure up to three rings on the device (the device can be manager or client) with a manager instance for each ring and one manager per device. Each ring with a single MRM can support up to 50 MRCs.


Note


The MRP feature license (mrp-manager or mrp-client) applies only to Cisco IOS XE releases earlier than 17.7.1. Use of MRP in Cisco IOS XE 17.7.1 and later does not require a feature license, only the Network Essentials Base license.


The following MRP configuration parameters are optional except for domain-id, which is required for multiple MRP rings, and priority:

  • domain-id—A unique ID that represents the MRP ring.

  • domain-name—Logical name of the configured MRP domain-ID.

  • profile—200 ms (the default)

  • vlan-id—VLAN for sending MRP frames.

  • default—In global MRP configuration, sets the mode to client.

Configuring MRP Manager

Follow this procedure to configure the switch as MRA in MRP CLI Mode.

Because PROFINET MRP is the default mode of the switch, you will need to disable that mode to allow operation in MRP CLI mode in Step 1 below.


Note


If the device is connected to a PLC module, please make sure “no device in the ring” is selected for MRP.

Procedure


Step 1

Enter configuration mode:

configure terminal

no profinet mrp

Step 2

Enable MRP:

mrp ring 1

Step 3

Configure MRP manager mode on the switch:

mode auto-manager

Step 4

(Optional for single MRP ring) Configure the domain ID:

domain-id value

value —UUID string of 32 hexadecimal digits in five groups separated by hyphens

Example: 550e8400-e29b-41d4-a716-446655440000

The default domain ID for ring 1 is FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFE.

Note

 

Only change the domain-ID from the default when required.

Step 5

(Optional for single MRP ring) Configure the domain name:

domain-name name

name —String of up to 32 characters

Step 6

(Optional) Configure the VLAN ID:

vlan-id vlan

Step 7

(Optional) Configure the recovery profile:

profile {30 |200 | 500 }

  • 30—Maximum recovery time 30 milliseconds

  • 200—Maximum recovery time 200 milliseconds

  • 500—Maximum recovery time 500 milliseconds

Step 8

Configure the MRA priority:

priority value

value —Range: <36864 – 61440>, lowest: 65535.

The default priority is 40960.

Step 9

Configure the interval:

interval interval

  • 3—3 milliseconds MRP_Test default interval for 30 ms profile

  • 20—20 milliseconds MRP_Test default interval for 200 ms profile

  • 50—50 milliseconds MRP_Test default interval for 500 ms profile

  • <3-10>—Optional faster MRP_Test interval in milliseconds

Note

 

The optional faster MRP_Test interval can be configured only when the ring is formed with IE3x00 devices.

Step 10

Specify the ID of the port that serves as the first ring port:

interface port

Step 11

Configure the interface mode:

switchport mode { access | trunk }

Note

 
You must specify switchport mode access when configuring MRP in access mode.

Step 12

Associate the interface to the MRP ring:

mrp ring 1

Step 13

Return to global configuration mode:

exit

Step 14

Specify the ID of the port that serves as second ring port:

interface port

Step 15

Configure the interface mode:

switchport mode { access | trunk }

Note

 
You must specify switchport mode access at this step when configuring MRP in access mode.

Step 16

Associate the interface to the MRP ring:

mrp ring 1

Step 17

Return to privileged EXEC mode:

end

Step 18

(For multiple rings) Repeat step 2 through 15 for each additional ring:

  • Assign ring number 2 for the second ring.

  • Assign a unique domain ID for Ring 2. The default domain ID for ring 2 is FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFD.

  • Assign ring number 3 for the third ring.

  • Assign a unique domain ID for Ring 3. The default domain ID for ring 3 is FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFC.

Note

 
Each ring should have its own domain ID. No two rings share the same domain ID.

Example

The following example shows configuring MRP automanager:


Switch#configure terminal
Switch# no profinet mrp
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#mrp ring 1
Switch(config-mrp)#mode manager
Switch(config-mrp-manager)#domain-id FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
Switch(config-mrp-manager)#priority 40960
Switch(config-mrp-manager)#end
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#GigabitEthernet1/2
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#exit
Switch(config)#GigabitEthernet1/1
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#exit 
Switch(config-if)#end
 
Switch# show mrp ring 1
MRP ring 1

Profile : 200 ms
Mode : Auto-Manager
Priority : 40960
Operational Mode: Client
From : CLI
License : Active
Best Manager :
MAC Address : 00:78:88:5E:03:81
Priority : 36864

Network Topology: Ring
Network Status : OPEN
Port1: Port2:
MAC Address :84:B8:02:ED:E8:02 MAC Address :84:B8:02:ED:E8:01
Interface :GigabitEthernet1/2 Interface :GigabitEthernet1/1
Status :Forwarding Status :Forwarding

VLAN ID : 1
Domain Name : Cisco MRP Ring 1
Domain ID : FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

Topology Change Request Interval : 10ms
Topology Change Repeat Count : 3
Short Test Frame Interval : 10ms
Default Test Frame Interval : 20ms
Test Monitoring Interval Count : 3
Test Monitoring Extended Interval Count : N/A
Switch#show mrp ports
 
Ring ID : 1
PortName                Status
--------------------------------------
GigabitEthernet1/2         Forwarding
GigabitEthernet1/1         Forwarding

Note


The show mrp ring output shows "License: Not Applicable" in CLI and Profinet mode in Cisco IOS XE release 17.7.1 and later.


Configuring MRP Client

Follow this procedure to configure the switch as an MRP Client.

Procedure


Step 1

Enter configuration mode:

configure terminal

Step 2

Enable MRP:

mrp ring 1

Step 3

Configure MRP client mode (if you do not specify the mode, client mode is the default):

mode client

Step 4

(Optional) Configure the domain ID matching the one configured for this ring on MRM:

domain-id value

value —UUID string of 32 hexadecimal digits in five groups separated by hyphens

Example: 550e8400-e29b-41d4-a716-446655440000

The default domain ID for ring 1 is FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFE.

Step 5

Return to privileged EXEC mode:

end

Step 6

Enter configuration mode:

configure terminal

Step 7

Specify the ID of the port that serves as the first ring port:

interface port

Step 8

Configure the interface mode:

switchport mode { access | trunk }

Note

 
You must specify switchport mode access when configuring MRP in access mode.

Step 9

Associate the interface to the MRP ring:

mrp ring 1

Step 10

Return to global configuration mode:

exit

Step 11

Specify the ID of the port that serves as second ring port:

interface port

Step 12

Configure the interface mode:

switchport mode { access | trunk }

Note

 
You must specify switchport mode access when configuring MRP in access mode.

Step 13

Associate the interface to the MRP ring:

mrp ring 1

Step 14

Return to privileged EXEC mode:

end


Example

The following example shows configuring MRP client:


Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#mrp ring 1
Switch(config-mrp)#mode client
Switch(config-mrp-client)#end
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface gi1/1
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
Switch(config-if)#exit
Switch(config)#interface gi1/2
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
Switch(config-if)#end
 
Switch#show mrp ring
MRP ring 1

Mode : Client
From : CLI
License : Active
Best Manager :
MAC Address : Unknown
Priority : Unknown

Network Topology: Ring
Network Status : Unknown
Port1: Port2:
MAC Address :30:F7:0D:68:07:81 MAC Address :30:F7:0D:68:07:82
Interface :GigabitEthernet1/1 Interface :GigabitEthernet1/2
Status :Forwarding Status :Forwarding

VLAN ID : 1
Domain Name : Cisco MRP Ring 1
Domain ID : FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

Link Down Timer Interval : 20 ms
Link Up Timer Interval : 20 ms
Link Change (Up or Down) count : 4 ms
MRP ring 2 not configured
MRP ring 3 not configured

Note


The show mrp ring output shows "License: Not Applicable" in CLI and Profinet mode in Cisco IOS XE release 17.7.1 and later.


Re-enabling PROFINET MRP

PROFINET MRP is enabled by default. Follow these steps only if your switch is currently operating in MRP CLI mode and you wish to change the operating mode back to PROFINET MRP.


Note


Do not configure switchport mode trunk on the interfaces that you want to configure for PROFINET MRP. You can have default vlan mode/no configuration or switchport access vlan 1 CLI configuration on the PROFINET MRP interfaces.

Procedure


Step 1

Enter configuration mode:

configure terminal

Step 2

Enable PROFINET MRP:

profinet mrp

Step 3

Configure PROFINET MRP Client or PROFINET MRP Manager using the TIA portal.

The following example shows how to enable PROFINET MRP and check the status:


Example


switch#configure terminal
switch(config)# profinet mrp
switch(config)# end
switch#show profinet status
Profinet : Enabled
Connection Status : Connected
Vlan : 50
Profinet ID : ie2km1
GSD version : Match
Reduct Ratio : 128
MRP : Enabled
MRP License Status : Active
MRP Max Rings Allowed : 3
MRC2# sh profinet mrp ring 1
MRP ring 1
Profile     : 200 ms
Mode        : Client
From        : Profinet
Network Topology: Ring
PNPORT 1:(0/32769)				PNPORT 2:(0/32770)
 MAC Address    :78:DA:6E:57:9C:83          MAC Address
:78:DA:6E:57:9C:84
 Interface      :gigabitEthernet1/1            Interface      :gigabitEthernet1/2
 Status         :Forwarding                 Status         :Forwarding
VLAN ID     : 1
Domain Name : mrpdomain-1
Domain ID   : C3D687FE789E3A1ACDBE5BFCBBC27B6
Topology Change Request Interval        : 10ms
Topology Change Repeat Count            : 3
Short Test Frame Interval               : 10ms
Default Test Frame Interval             : 20ms
Test Monitoring Interval Count          : 3
Test Monitoring Extended Interval Count : N/A

Verifying Configuration

Command

Description

show mrp ring {1 - 3 }

Display details about the MRP ring configuration.

show mrp ports

Display details about the MRP port states. If MRP is not configured on any ports, display shows N/A.

show mrp ring {1 - 3 } statistics [all | event | hardware | packet | platform ]

Display details about the MRP ring operation.

debug mrp [alarm |cli | client | license | manager | packet | platform ]

Trace MRP events.

Note

 

manager is available only when the switch is configured as manager or automanager.

license is available only in Cisco IOS XE 17.6.x and earlier.

show profinet status

Display details about PROFINET.

show profinet mrp ring ring id

Display details about the PROFINET MRP ring configuration.

show tech-support profinet

Display all Profinet details.

Command

Description

show mrp ring {1 - 3 }

Display details about the MRP ring configuration.

show mrp ports

Display details about the MRP port states. If MRP is not configured on any ports, display shows N/A.

show mrp ring {1 - 3 } statistics [all | event | hardware | packet | platform ]

Display details about the MRP ring operation.

debug mrp-ring [alarm |cli | client | license | manager | packet | platform ]

Trace MRP events.

Note

 

manager is available only when the switch is configured as manager or automanager.

license is available only in Cisco IOS XE 17.6.x and earlier.

show profinet status

Display details about PROFINET.

show profinet mrp ring ring id

Display details about the PROFINET MRP ring configuration.

show tech-support profinet

Display all Profinet details.

Configuration Example

The following example shows the MRP switch configured as manager:


Switch#configure terminal
Switch# no profinet mrp
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#mrp ring 1
Switch(config-mrp)#mode manager
Switch(config-mrp-manager)#end
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface gi1/8
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#exit
Switch(config)#interface gi1/7
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#end
 
Switch#show mrp ring
MRP ring 1
 
Profile     : 200 ms
Mode        : Master
From        : CLI
 
Network Topology: Ring
Port1:                                     Port2:
MAC Address    :2C:54:2D:2C:3E:0A          MAC Address    :2C:54:2D:2C:3E:09
Interface      :gigabitEthernet1/8            Interface      :gigabitEthernet1/7
Status         :Forwarding                 Status         :Forwarding
 
VLAN ID     : 1
Domain Name : Cisco MRP
Domain ID   : FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
 
Topology Change Request Interval        : 10ms
Topology Change Repeat Count            : 3
Short Test Frame Interval               : 10ms
Default Test Frame Interval             : 20ms
Test Monitoring Interval Count          : 3
Test Monitoring Extended Interval Count : N/A
Switch#show mrp ports
 
Ring ID : 1
PortName                Status
--------------------------------------
gigabitEthernet1/7         Forwarding
gigabitEthernet1/8         Forwarding
 

The following example shows the MRP switch configured as automanager:


Switch#configure terminal
Switch# no profinet mrp
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#mrp ring 1
Switch(config-mrp)#mode auto-manager
Switch(config-mrp-auto-manager)#priority 36864
Switch(config-mrp-auto-manager)#end
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface gi1/2
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#exit
Switch(config)#interface gi1/1
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
WARNING% Enabling MRP automatically set STP FORWARDING. It is recommended to shutdown all interfaces which are not currently in use to prevent potential bridging loops.
Switch(config-if)#end
 
Switch#show mrp ring
MRP ring 1

Profile     : 200 ms
Mode        : Auto-Manager
Priority    : 36864
Operational Mode: Manager
From        : CLI
License     : Active
Best Manager MAC Address    :84:B8:02:ED:E8:01     priority 36864     

Network Topology: Ring
Network Status  : OPEN
Port1:                                     Port2:
 MAC Address    :84:B8:02:ED:E8:02          MAC Address    :84:B8:02:ED:E8:01
 Interface      :GigabitEthernet1/2         Interface      :GigabitEthernet1/1
 Status         :Forwarding                 Status         :Forwarding

VLAN ID     : 1
Domain Name : Cisco MRP Ring 1
Domain ID   : FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

Topology Change Request Interval        : 10ms
Topology Change Repeat Count            : 3
Short Test Frame Interval               : 10ms
Default Test Frame Interval             : 20ms
Test Monitoring Interval Count          : 3
Test Monitoring Extended Interval Count : N/A

          
Topology Change Request Interval        : 10ms
Topology Change Repeat Count            : 3
Short Test Frame Interval               : 10ms
Default Test Frame Interval             : 20ms
Test Monitoring Interval Count          : 3
Test Monitoring Extended Interval Count : N/A

The following example shows the MRP switch configured as client:


Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#mrp ring 1
Switch(config-mrp)#mode client
Switch(config-mrp-client)#end
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface gi1/3
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
Switch(config-if)#exit
Switch(config)#interface gi1/4
Switch(config-if)#switchport mode trunk
Switch(config-if)#mrp ring 1
Switch(config-if)#end
 

Feature History

The following table shows the Cisco IOS release in which the feature is first supported on each of the IE switch platforms that support MRP.

Switch Platform

Feature

Initial Release

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP Support

Cisco IOS XE Gibraltar 16.12.1

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP-PROFINET

Cisco IOS XE Amsterdam 17.1.1

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP 500ms Profile Support

Cisco IOS XE Amsterdam 17.3.1

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP Support on Trunk Links

Cisco IOS XE Bengaluru 17.4.1

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP License removal

Cisco IOS XE Cupertino 17.7.1

Cisco Catalyst IE3x00 Rugged Series and Cisco Catalyst IE3400 Heavy-Duty Series Switches

MRP: 30ms Profile Support

Cisco IOS XE Cupertino 17.9.1

Cisco Catalyst IE3100 Rugged Series Switches

  • MRP: 30ms Profile Support

  • MRP 200ms Profile Support

  • MRP 500ms Profile Support

  • MRP CLI support by default

Cisco IOS XE Dublin 17.11.1