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| marathoner 2002-05-27, 12:20 am |
| How much RAM (not NVRAM) is in a 2501? How do you find out. I read specs for various sizes. Can the size of the RAM exceed the size of the Flash. So you could load a bigger system in and run off it than you can save in flash. | |
| Yankee 2002-05-27, 6:09 am |
| Maximum RAM and flash for a 2500 series are both 16M. You can see how much your router has with the "show version" command.
Yankee | |
| marathoner 2002-05-27, 11:23 am |
| So theoretically if you have enough RAM you can boot your router directly off a tftp or rcp even if you don't have enough flash to store the IOS...? Flash upgrades are kind of spendy for what you get. I rather suspect these old routers I am going to see tomorrow probably dont have enough RAM to run 12.0 and it's not feasible to upgrade that either. But it was worth a try.
My next question is if you buy an old router on ebay or something and you want to upgrade the IOS, don't you need a customer code or something to download the IOS? and can that be transferred with ownership of a router or just what is the deal with that. People on other boards talk about upgrading IOS like it is just a matter of pressing a few buttons... | |
| Yankee 2002-05-29, 4:26 am |
| Yes a CCO account is needed for access to download IOS versions from Cisco or you can contact them and buy and upgraded version.
Yankee | |
| Detour 2002-05-30, 10:59 am |
| quote:
Originally posted by marathoner
So theoretically if you have enough RAM you can boot your router directly off a tftp or rcp even if you don't have enough flash to store the IOS...? Flash upgrades are kind of spendy for what you get. I rather suspect these old routers I am going to see tomorrow probably dont have enough RAM to run 12.0 and it's not feasible to upgrade that either. But it was worth a try.
yes when you boot from tftp the image is moved directly into ram. You can also compress images using the *nix 'compress' command, so they will fit into flash. Again, you must have enough ram for the uncompressed version. |
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