Currently our client are using thirty units of 2611XM router with IOS c2600-js-mz.123-26.bin.
For security requirement, they have to upgrade all the routers to provide SSH access. At the moment each unit have 128MB DRAM and 32MB flash.
Having tested a few IOS 12.4 versions, but for some reason, after booting the device, it complaint about 'Memory requirement are 'UNKNOWN' or maybe unsupported configuration.
Just wondering if anyone has came across such problem. Can provide more details if needed.