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A method on network failover path direction design for management controller

IP.com Disclosure Number: IPCOM000201140D
Publication Date: 2010-Nov-09
Document File: 3 page(s) / 136K

Publishing Venue

The IP.com Prior Art Database

Abstract

There are some reasons cause management controller network unreachable, e.g. NIC chip failure, network cable disconnect, switch failure. If we could construct a network connection redundancy environment, when one Ethernet device failed and another Ethernet device will recover the fault. It could provide user reliable and high availability environment with management controller network. Here we provide a method to model a NIC failover path to facilitate management firmware to switch to an available management network port more efficiently.

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Page 01 of 3

A method on network failover path direction design for management controller

We apply a method to modeling the failover path direction for mixed NIC device.

Our method supports multiple NIC devices failover switching.

Below is a three network ports of our design.

User IMM NIC Settings


The NIC settings are allowed to be changed by user via ipmi command, utility (e.g. ASU) and UI interface (e.g. SP, uEFI). The setting options are as a table below:

User IMM NIC Settings Setting Value

Dedicated Port Setting= 1 Shared Port 0 Setting= 2 Shared Port 1 Setting= 3 Shared with Failover Setting= 4
All NICs teaming with Failover Setting= 5

Table 1 IMM NIC Setting Options

- FailBit


The FailBit is a 0,1 base parameter to describe which network port is failed. E.g. If we have three network ports, FailBit= 000, means all network ports is healthy. FailBit= 001, means the network port 0 failed.

Bit position 2 Bit position 1 Bit position 0

Shared Port 1 Shared Port 0 Dedicated Port

Table 2 FailBit and Network Port mapping

- DisableBit


The DisableBit is a 0,1 base parameter to describe which network port is disabled. E.g. If we have three network port, DisableBit= 000, means no network port is disabled. DisableBit= 011, means network port 0 and network port 1 are disabled.

Bit position 2 Bit position 1 Bit position 0

Shared Port 1 Shared Port 0 Dedicated Port

Table 3 DisableBit and Network Port mapping

- Failover Path Direction


The failover path direction is a guidance for IMM know how to failover when a NIC failed. For IMM case, there is a direction as below table:
(Rule: If more than one network ports are available, the NIC Manager will choose dedicated port first, then shared port 0, shared prot 1.)

FailBit description Failover To

FailBi...