IP网交换机主控板主备倒换风险研究

本地业务网络在实际工作中采用主备网双平面方式运行,各平面核心层交换机重要单板采用主备配置,一般情况下单板或设备出现异常,系统可以实现无缝割接,业务不受影响;但是,在实际维护过程中,由于配置了不同的检测机制,核心层交换机主控板倒换过程中,业务可能会出现异常。针对实际维护过程中发现的主控板倒换系统上报异常告警问题,通过跟踪异常情况下业务的错误转发路径分析主控板倒换对组网业务的影响,对异常告警产生的机理进行分析,提出通过重新激活BFD(Bidirectional Forwarding Detection,双向转发检测)会话的方式以保证业务正常转发路径的处理方法,以及对主控板版本进行升级的解决建议,可以有效保证业务网络的可靠运行。

Study on risks of master/slave switch of main control board in IP network switches

Local service IP networks usually operate in dual redundancy double plane mode and major single boards of core layer switches have standby boards.When a board is abnormal, the system can realize seamless switchover and service will not be affected.But in actual maintenance, due to configuration of different detection mechanisms, service may encounter abnormal operation in switching process of main control boards.To handle abnormal system alarms reported in switchover of main processing units in actual maintenance, the mechanism of abnormal alarms is analyzed through analysis of the influence of main board switch over on network and service by tracking error service forwarding path under abnormal situation.A new method is proposed to ensure normal forwarding path of service by re activating BFD (Bidirectional Forwarding Detection) session and a solution is suggested for upgrade of the version of main processing units to ensure reliable operation of a service network