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2821 Adv. IP services ios upgrade to 12.4(20)T5 or 12.4(24)T3 ?

Have a customer with a number of Cisco 2821 routers running Adv. Ip. Services, 12.4(11)XW7 with Frame-Relay links,  H323 gateways, PRI, Voip with Call Manager 6.x,Unity, IPCC.  Customer wants to know whether they should upgrade the 2821's to 12.4(20)T5 or 12.4(23)T3, both the latest.  Not looking for any new features, just stable reliable code.  Tried Cisco IOS on-line upgrade tool.  Doesn't seem to be to helpful.     Any suggestions would be appreciated?

Thanks in advance,

Tony C.

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Bronze

Re: 2821 Adv. IP services ios upgrade to 12.4(20)T5 or 12.4(24)T

Tony,

The recommended amount of flash for the 12.4(20)T5 is 64 MB, while

it is 128 MB for the 12.4(24)T3 release. If you have a 128 Meg flash,

then 12.4(24)T3 is generally considered a more stable release as far as

I know.

VR

Hall of Fame Super Gold

Re: 2821 Adv. IP services ios upgrade to 12.4(20)T5 or 12.4(24)T

Depends on the amount of DRAM, I'd recommend 15.1(1).

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