關於 HP IRF 分兩篇說明，
第一篇(本篇)是一些概念釐清。
第二篇是網路案例說明。
IRF 是 HP Switch 的 堆疊技術。
在設定之前，先知道一些概念與名詞。
關於 HP IRF 可以參考
以下內容大多取至連結手冊中節錄。
HP IRF 有兩種方式組成方式 :
一種是 MOD模組，
一種是
SFP模組。
IRF member roles
有 1 個 Master 和 多個 Standby。優先權是決定
Master 的一種方式。
Master
壞了，會在從 Standby 中選出一個 Master。
IRF uses two member
roles: master and standby (called "subordinate" throughout the
documentation). When devices form an IRF fabric, they elect a master to manage
and control the IRF fabric, and all the other devices back up the master. When
the master device fails, the other devices automatically elect a new master
from among them to take over. For more information about master election, see
"Master election." While backing up the master, all subordinate
devices process and forward traffic independently.
IRF member ID
IRF中 每個設備都有自己的ID，唯一。
後面看到 IRF Port n/1，n 代表 ID。
An IRF fabric uses
member IDs to uniquely identify and manage its members. This member ID
information is included as the first part of interface numbers and file paths
to uniquely identify interfaces and files in an IRF fabric. For more
information about interface and file path naming, see "Interface naming
conventions" and "File system naming conventions." If two
devices have the same IRF member ID, they cannot form an IRF fabric. If the IRF
member ID of a device has been used in an IRF fabric, the device cannot join
the fabric.
IRF port (邏輯概念的 Port )
IRF Port 1 與 Port2 為連接的一組Port，不能 Port 1 接 Port 1。
An IRF port is a
logical interface for the connection between IRF member devices. Every
IRF-capable device supports two IRF
ports. The IRF ports are named IRF-port n/1 and
IRF-port n/2, where n is the member ID of the switch. The two IRF ports are
referred to as "IRF-port 1" and "IRF-port 2" in this book
for simplicity. To use an IRF port, you must bind at least one physical
port to it. The physical ports assigned to an IRF port automatically form an
aggregate IRF link. An IRF port goes down only if all its physical IRF ports
are down.
Physical IRF port (實際連接的 Port，包含在 IRF Port 裡面)
Physical IRF ports
connect IRF member devices and must be bound to an IRF port. They forward the
IRF protocol packets between IRF member devices and the data packets that must
travel across IRF member devices. For more information about physical ports that
can be used for IRF links, see "IRF physical port restrictions and binding
requirements."
Member priority (優先權，預設是1，最高 32)
Member priority
determines the possibility of a member device to be elected the master. A member with higher priority is more likely to be
elected the master. The default member priority is 1. You can change the
member priority of a member device to affect the master election resul
IRF multi-active detection (IRF 出現腦裂的處理方式)
An IRF link failure
causes an IRF fabric to split in two IRF fabrics operating with the same Layer
3 configurations, including the same IP address. To avoid IP address collision
and network problems, IRF uses multi-active detection (MAD) mechanisms to detect
the presence of multiple identical IRF fabrics, handle collisions, and recover
from faults.
General restrictions and configuration guidelines
限制與設定的引導
Software requirements
All IRF member
switches must run the same software image version.
IRF physical port restrictions and binding
requirements
All SFP+ and QSFP+
ports on the 5900 switch and all SFP+ ports on the 5920 switch can be used as
IRF physical ports. When selecting transceiver modules and cables, follow these
guidelines:
• Use SFP+/QSFP+
transceiver modules and fibers for long-distance connection, or use SFP+/QSFP+
cables to connect SFP+/QSFP+ ports for short-distance connection.
• QSFP+ transceiver
modules are available only for the 5900 switches. For more information about
transceiver modules, see the switch installation guide.
• The transceiver
modules at the two ends of an IRF link must be the same type.
SFP+ ports on the HP
5900AF-48XG-4QSFP+ Switch, HP 5900AF-48XG-4QSFP+ TAA Switch, HP 5920AF-24XG
Switch, and HP 5920AF-24XG TAA Switch are grouped by port number in order,
starting from the one numbered 1. Each group contains four ports. Ports in the
same group must be used for the same purpose. If you use one port in a group as
an IRF physical port, the other ports in the group cannot be used for any other
purposes.
When binding an SFP+
port in an SFP+ port group to an IRF port or removing it from the IRF port,
shut down all the other SFP+ ports in the same group.
When connecting two neighboring IRF members, connect
IRF-port 1 on one member to IRF-port 2 on the other.
IRF 設備連接 必須 Port1 連接Port2，不能 IRF Port1 接 Port1。
On a physical port
bound to an IRF port, you can execute only the shutdown, description,
priority-flow-control, and flow-interval commands. For more information about
these commands, see Layer 2—LAN Switching Command Reference.
IRF link redundancy
You can bind up to
four physical ports to an IRF port for link redundancy.
Setup and
configuration task list 設定程序說明
HP recommends the
following IRF fabric setup and configuration procedure:
Setup and
configuration procedure
|
Remarks
|
1. (Required.)
Planning the IRF fabric setup
|
N/A
|
2. (Required.)
Assigning a member ID to each IRF member device
|
Perform this task on
each member device.
|
3. (Required.)
Specifying a priority for each member device
|
Perform this task on
each member device.
|
4. (Required.)
Connecting physical IRF ports
|
N/A
|
5. (Required.)
Binding physical ports to IRF ports
|
Perform this task on
each member switch.
When you complete
IRF port binding and activation on all IRF member devices, the IRF fabric is
formed.
|
6. (Required.)
Accessing the IRF fabric
|
When you log in to
the IRF fabric, you are placed at the master's CLI, where you complete
subsequent IRF settings and configure other features for the member devices
as if they were one device.
|
7. (Optional.)
Configuring a member device description
|
This task is
required for ARP MAD and LACP MAD.
|
8. (Optional.)
Configuring IRF link load sharing mode:
{ Configuring the
global load sharing mode { Configuring a port-specific load sharing mode
|
N/A
|
9. (Optional.)
Configuring IRF bridge MAC persistence
|
N/A
|
10. (Optional.)
Enabling software auto-update for software image synchronization
|
HP recommends
enabling software auto-update to make sure system software image
synchronization.
|
11. (Optional.)
Setting the IRF link down report delay
|
N/A
|
12. (Required.)
Configuring MAD: { Configuring LACP MAD { Configuring BFD MAD { Configuring
ARP MAD { Configuring ND MAD { Excluding a port from the shutdown action upon
detection of multi-active collision
|
MAD mechanisms are
independent of one another. You can configure at least one MAD mechanism for
an IRF fabric.
|
13. (Optional.)
Recovering an IRF fabric
|
N/A
|
-End-
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