最近在一用戶處巡檢，發現其核心交換機cisco4507R一個引擎有報警，查看module情況如下：
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，冗餘狀態爲disable，判斷引擎板有問題，因這個型號太老了，只能買到一塊舊的引擎板，爲保險起見，更換引擎前先備份配置和運行引擎板的ios，因怕ios太大tftp 32M文件的限制，採用ftp來上傳，用win7自帶的ftp功能（win7怎麼配ftp可以百度一下），具體過程如下：
4507r(config)#ip ftp username czq
4507r(config)#ip ftp password 615
在4507上建立可以ftp的win7 ftp服務器的用戶名和密碼，接下來備份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)
同樣把start-config配置也拷貝一下。
把引擎板熱插入原故障板的槽位中，耐心等待直到原故障燈變爲綠色，查看module，發現更換的引擎與原引擎版本不同，並且冗餘狀態爲 Standby Supervisor SSO Standby clod，這不是想要的最終狀態，需要升級引擎與原引擎一致，過程如下：
4507r# copy bootflash： slavebootflash：
刪除slave的ios ：
4507r#delete slavebootflash：
需要把更換的引擎板再重啓一下，（可以重新插入引擎板），以便新ios生效，最後module狀態如下：
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
現在更換引擎已是熱備狀態，齊活，可以收工了。