最近在一用户处巡检，发现其核心交换机cisco4507R一个引擎有报警，查看module情况如下：
4507r#show module
Chassis Type : WS-C4507R
Power consumed by backplane : 40 Watts
Mod Ports Card Type Model Serial No.
---+-----+--------------------------------------+------------------+-----------
1 2 Supervisor II+ 1000BaseX (GBIC) WS-X4013+ JAE12513NLI
2 Supervisor
3 6 1000BaseX (GBIC) WS-X4306-GB JAE12502T8B
4 6 1000BaseX (GBIC) WS-X4306-GB JAE124601NW
5 48 10/100/1000BaseT (RJ45) WS-X4548-GB-RJ45 JAE12513G3Q
M MAC addresses Hw Fw Sw Status
--+--------------------------------+---+------------+----------------+---------
1 0024.1430.85c0 to 0024.1430.85c1 4.6 12.2(31r)SGA 12.2(31)SGA8 Ok
2 Unknown Unknown Unknown Other
3 001b.5481.9dc6 to 001b.5481.9dcb 4.4 Ok
4 0016.c76f.a84e to 0016.c76f.a853 4.4 Ok
5 0024.1441.2740 to 0024.1441.276f 2.5 Ok
Mod Redundancy role Operating mode Redundancy status
----+-------------------+-------------------+----------------------------------
1 Active Supervisor SSO Active
2 Standby Supervisor SSO Disabled
在槽2 的引擎板看不到，冗余状态为disable，判断引擎板有问题，因这个型号太老了，只能买到一块旧的引擎板，为保险起见，更换引擎前先备份配置和运行引擎板的ios，因怕ios太大tftp 32M文件的限制，采用ftp来上传，用win7自带的ftp功能（win7怎么配ftp可以百度一下），具体过程如下：
4507r(config)#ip ftp username czq
4507r(config)#ip ftp password 615
在4507上建立可以ftp的win7 ftp服务器的用户名和密码，接下来备份ios，
4507r#copy bootflash:cat4500-ipbase-mz.122-31.SGA8.bin ftp
Address or name of remote host []? 192.168.13.107
Destination filename [cat4500-ipbase-mz.122-31.SGA8.bin]?
Writing cat4500-ipbase-mz.122-31.SGA8.bin !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!12127880 bytes copied in 12.096 secs (1002636 bytes/sec)
同样把start-config配置也拷贝一下。
把引擎板热插入原故障板的槽位中，耐心等待直到原故障灯变为绿色，查看module，发现更换的引擎与原引擎版本不同，并且冗余状态为 Standby Supervisor SSO Standby clod，这不是想要的最终状态，需要升级引擎与原引擎一致，过程如下：
4507r# copy bootflash： slavebootflash：
删除slave的ios ：
4507r#delete slavebootflash：
需要把更换的引擎板再重启一下，（可以重新插入引擎板），以便新ios生效，最后module状态如下：
4507r#show module
Chassis Type : WS-C4507R
Power consumed by backplane : 40 Watts
Mod Ports Card Type Model Serial No.
---+-----+--------------------------------------+------------------+-----------
1 2 Supervisor II+ 1000BaseX (GBIC) WS-X4013+ JAE12513NLI
2 2 Supervisor II+ 1000BaseX (GBIC) WS-X4013+ JAE1119G877
3 6 1000BaseX (GBIC) WS-X4306-GB JAE12502T8B
4 6 1000BaseX (GBIC) WS-X4306-GB JAE124601NW
5 48 10/100/1000BaseT (RJ45) WS-X4548-GB-RJ45 JAE12513G3Q
M MAC addresses Hw Fw Sw Status
--+--------------------------------+---+------------+----------------+---------
1 0024.1430.85c0 to 0024.1430.85c1 4.6 12.2(31r)SGA 12.2(31)SGA8 Ok
2 0024.1430.85c2 to 0024.1430.85c3 4.3 12.2(31r)SG2 12.2(31)SGA8 Ok
3 001b.5481.9dc6 to 001b.5481.9dcb 4.4 Ok
4 0016.c76f.a84e to 0016.c76f.a853 4.4 Ok
5 0024.1441.2740 to 0024.1441.276f 2.5 Ok
Mod Redundancy role Operating mode Redundancy status
----+-------------------+-------------------+----------------------------------
1 Active Supervisor SSO Active
2 Standby Supervisor SSO Standby hot
现在更换引擎已是热备状态，齐活，可以收工了。
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