Overview of HP stack stack technology IRF (Intelligent Resilient Framework) and setting

What is the HP Switch IRF?

The technique of stacking HP switches (considering two switches as one ) is called IRF (Intelligent Resilient Framework). With this technology, you can build a stack using the Ethernet port without requiring dedicated stack port / stack code like a normal stack. In other words, it can be used both as an Ethernet port and as a stack port. However, it seems that IRF can not be configured on 1000Base-T port.

Procedure for adding an IRF switch to one operating switch

When configuring an IRF for one operating switch, the rough procedure is as follows.

  1. Adjust one switch to match the farm of the active switch
  2. Add the IRF setting appropriately to the two switches and save. Set irf priority so that the switch to be added becomes Slave (larger one is Master, smaller one is Slave)
  3. Connect cables with the added switch stopped
  4. Activate additional switch

Be careful as rebooting will run if you connect with the switch to be added becoming Master or with the switch to be added activated.

Setting Example

[SW1]

] irf member 1 priority 20
] interface range Ten-GigabitEthernet 1/0/51 to Ten-GigabitEthernet 1/0/52
] shutdown
] irf-port 1/1
] port group interface Ten-GigabitEthernet 1/0/51
] irf-port 1/2
] port group interface Ten-GigabitEthernet 1/0/52
] interface range Ten-GigabitEthernet 1/0/51 to Ten-GigabitEthernet 1/0/52
] undo shutdown
] irf-port-configuration active
] save

[SW 2]

] irf member 1 renumber 2
] save
] reboot
] #########
] irf member 2 priority 10
] interface range Ten-GigabitEthernet 2/0/51 to Ten-GigabitEthernet 2/0/52
] shutdown
] irf-port 2/1
] port group interface Ten-GigabitEthernet 2/0/51
] irf-port 2/2
] port group interface Ten-GigabitEthernet 2/0/52
] interface range Ten-GigabitEthernet 2/0/51 to Ten-GigabitEthernet 2/0/52
] undo shutdown
] irf-port-configuration active
] save

important point

Connect irf-port 1/2 to irf-port 2/1 and connect irf-port 1/1 and irf-port 2/2. Otherwise IRF configuration can not be constructed.

Check command

] display irf
] display irf configuration

What is MAD

MAD is an abbreviation of Multi Active Detection , and it is a technique to avoid that both of the two are Master when the communication of IRF stack port can not be done even with 2 ports.Specifically, when Multi Active is detected by MAD, a switch with a high irf priority is used, and a switch with a low irf priority shutdown all ports.

There are three specific implementations as follows.

  1. LACP MAD
  2. BFD MAD
  3. ARP MAD

For example, if you are using Bridge-Aggregation (LACP) over the chassis of an IRF stack, MAD can be realized by using LACP MAD.Have the " LACPDU with extended data for MAD " sent by itself be wrapped by the opposite switch.As a result, even if the IRF stack configuration collapses, you can check the status of the two units via the opposite switch, so you can make use of the one with the higher irf priority.

So the counter switch must also be an HP made switch.

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