On the menu bar, choose Fabric > Access Policies.

In the Navigation pane, expand Interfaces and Leaf Interfaces and Profiles.

Right-click Profiles and choose Create Leaf Interface Profile.

Type the name and optional description, click the + symbol on Interface Selectors

Perform the following:

1. Type a name (and optional description) for the Access Port Selector.

2. In the Interface IDs field, type the slot and port for the breakout port.

3. In the Interface Policy Group field, click the down arrow and choose Create Leaf Breakout Port Group.

4. Type the name (and optional description) for the Leaf Breakout Port Group.

5. In the Breakout Map field, choose 10g-4x or 25g-4x.

   For switches supporting breakout, see Configuration of Dynamic Breakout Ports.

6. Click Submit.

To assign a Breakout Port to an EPG, perform the following steps:

1. Select the Statically Link with Leaves/Paths check box to gain access to the Leaves/Paths tab in the dialog box.

2. Complete one of the following sets of steps:

To associate the Leaf Interface Profile to a the leaf switch, perform the following steps:

1. Expand Switches and Leaf Switches, and Profiles.

2. Right-click Profiles and select Create Leaf Profiles.

3. Type the name and optional description of the Leaf Profile.

4. Click the + symbol on the Leaf Selectors area.

5. Type the leaf selector name and an optional description.

6. Click the down arrow on the Blocks field and choose the switch to be associated with the breakout leaf interface profile.

7. Click the down arrow on the Policy Group field and choose Create Access Switch Policy Group.

8. Type a name and optional description for the Access Switch Policy Group.

9. Optional. Enable other policies.

10. Click Submit.

11. Click Update.

12. Click Next.

13. In the Associations Interface Selector Profiles area, choose the Interface Selector Profile you previously created for the breakout port.

14. Click Finish.

To verify the breakout port has been split into four sub ports, perform the following steps:

1. On the Menu bar, click Fabric > Inventory.

2. On the Navigation bar, click the Pod and Leaf where the breakout port is located.

3. Expand Interfaces and Physical Interfaces.

   You should see four ports at the position where the breakout port was configured. For example, if you configured 1/10 as a breakout port, you should see the following:

   • eth1/10/1

   • eth1/10/2

   • eth1/10/3

   • eth1/10/4

To configure the sub ports, perform the following steps:

1. On the Menu bar, click Fabric > Access Policies.

2. On the Navigation bar, expand Interfaces, Leaf Interfaces, Profiles, and the breakout leaf interface profile you previously created.

   You will see a port selector with the breakout cable. Instead of defining a sub port block under already existing port selector, you need to define on a new access port selector.

3. On the Navigtion bar, right click the higher level interface profile and select Create Access Port Selector.

4. In the Name field, enter the sub port name.

5. In the Interface IDs field, enter the IDs for the four sub ports in a format such as 1/10/1-4.

6. In the Interface Policy Group field, select Create Leaf Access Port Policy Group.

7. Click Submit.

To apply the Policy Group to an individual interface that links the AAEP to the port, perform the following steps:

1. In the Name field, enter the name for the Leaf Access Port Group Policy.

2. In the Link Level Policy field, select link-level_auto.

3. In the CDP Policy field, select cdp_enabled.

4. In the LLDP Policy field, select default.

5. In the Attached Entity Profile field, select the AAEP profile to attach to the policy group.

6. Click Submit.

Configure a breakout policy group for the breakout port with JSON, such as the following example:

{
            "infraAccPortP": {
              "attributes": {
                "dn":"uni/infra/accportprof-brkout44",
                "name":"brkout44",
                "rn":"accportprof-brkout44",
                "status":"created,modified"
                },
                "children":[ {
                     "infraHPortS": {
                        "attributes": {
                          "dn":"uni/infra/accportprof-brkout44/hports-new-brekoutPol-typ-range",
                          "name":"new-brkoutPol",
                          "rn":"hports-new-brkoutPol-typ-range",
                          "status":"created,modified"
                     },
                     "children":[ {
                        "infraPortBlk": {
                          "attributes": {
                            "dn":"uni/infra/accportprof-brkout44/hports-new-brkoutPol-typ-range/portblk-block2",
                            "fromPort":"44",
                            "toPort":"44",
                            "name":"block2",
                            "rn":"portblk-block2",
                            "status":"created,modified"
                         },
                         "children":[] }
                  }, {
            "infraRsAccBaseGrp": {
              "attributes":{
                 "tDn":"uni/infra/funcprof/brkoutportgrp-new-brkoutPol",
                 "status":"created,modified"
              },
              "children":[] 
             }
           }
         ]
       }
     }
   ]
 }
}

Create a new switch profile and associate it with the port profile, previously created, with JSON such as the following example:

{
   "infraNodeP": {
     "attributes": {
       "dn":"uni/infra/nprof-leaf1017",
       "name":"leaf1017","rn":"nprof-leaf1017",
       "status":"created,modified"
      },
      "children": [ {
        "infraLeafS": {
          "attributes": {
            "dn":"uni/infra/nprof-leaf1017/leaves-1017-typ-range",
            "type":"range",
            "name":"1017",
            "rn":"leaves-1017-typ-range",
            "status":"created"
      },
      "children": [ {
        "infraNodeBlk": {
          "attributes": {
            "dn":"uni/infra/nprof-leaf1017/leaves-1017-typ-range/nodeblk-102bf7dc60e63f7e",
            "from_":"1017","to_":"1017",
            "name":"102bf7dc60e63f7e",
            "rn":"nodeblk-102bf7dc60e63f7e",
            "status":"created"
           },
           "children": [] }
          }
        ]
      }
    }, {
      "infraRsAccPortP": {
        "attributes": {
          "tDn":"uni/infra/accportprof-brkout44",
          "status":"created,modified"
     },
     "children": [] }
      }
    ]
  }
}

Configure the subports.

{
   "infraAccPortP": {
     "attributes": {
       "dn":"uni/infra/accportprof-brkout44",
       "name":"brkouttest1",
       "rn":"accportprof-brkout44",
       "status":"created,modified"
     },
     "children": [{
       "infraHPortS": {
         "attributes": {
           "dn":"uni/infra/accportprof-brkout44/hports-sel1-typ-range",
           "name":"sel1",
           "rn":"hports-sel1-typ-range",
           "status":"created,modified"
        },
        "children": [{ 
          "infraSubPortBlk": {
            "attributes": {
              "dn":"uni/infra/accportprof-brkout44/hports-sel1-typ-range/subportblk-block2",
              "fromPort":"44",
              "toPort":"44",
              "fromSubPort":"3",
              "toSubPort":"3", 
              "name":"block2",
              "rn":"subportblk-block2",
              "status":"created"
             },
             "children":[]}
             },
           {
             "infraRsAccBaseGrp": {
                 "attributes": {
                   "tDn":"uni/infra/funcprof/accportgrp-p1",
                   "status":"created,modified"
                 },
                 "children":[]}
                 }
               ]
             }
           }
         ]
       }
     }

Deploy an EPG on a specific port.

<fvTenant name="<tenant_name>" dn="uni/tn-test1" >
    <fvCtx name="<network_name>" pcEnfPref="enforced" knwMcastAct="permit"/>
    <fvBD name="<bridge_domain_name>" unkMcastAct="flood" >
        <fvRsCtx tnFvCtxName="<network_name>"/>
    </fvBD>
    <fvAp name="<application_profile>" >
        <fvAEPg name="<epg_name>" >
            <fvRsPathAtt tDn="topology/pod-1/paths-1017/pathep-[eth1/13]" mode="regular" instrImedcy="immediate" encap="vlan-20"/>
        </fvAEPg>
    </fvAp>
</fvTenant>