cisco4000升級(jí)IOS錯(cuò)誤后怎么辦？

hellocf

升級(jí)IOS后重起出現(xiàn)如下提示\r\n\r\nSystem Bootstrap, Version (5), SOFTWARE\r\nCopyright (c) 1986-1994 by cisco Systems\r\n4000 processor with 16384 Kbytes of main memory\r\n\r\nBooting c4000-is-mz.120-7.bin from Flash address space rrrrrrrrrrrrrrrrrrrr\r\n[OK - 1310720/15994142 bytes]\r\nF3: 9176+3542858+165008 at 0x12000\r\n\r\nError : compressed image checksum is incorrect 0x23D338BE\r\n        Expected a checksum of 0x53C52712\r\n\r\nException: Software forced crash at 0x1214e (PC)\r\n\r\n然后反復(fù)，請(qǐng)問如何恢復(fù)。