[c-nsp] 6504-E IOS SSH/memory issues

[Lukas Tribus]

> That is very strange.
> 
> I can hold more views on a 2GB NPE-G2.

Sure, but that NPE-G2 has full access to 2048MB of RAM.

When you have a ASR1002 (RP1, 32bit), you don't have more than 1,7GB
allocated to IOSd (2GB RAM, the 32-bit per process limit, minus the
memory needed for decompressing IOS).

The following is a ASR1002-RP1 with redundancy disabled:
cisco ASR1002 (2RU) processor with *1673154K/6147K* bytes of memory.
4194304K bytes of physical memory.

A ASR1004-RP1 with redundancy enabled (results in about 690MB RAM):
cisco ASR1004 (RP1) processor with *680124K/6147K* bytes of memory.
4194304K bytes of physical memory.

Even worse with a ASR1001 with redundancy disabled, you have 1,2GB [1]:
cisco ASR1001 (1RU) processor with *1207128K/6147K* bytes of memory.
4194304K bytes of physical memory.


Of course, IOS-XE @1,7GB or 1,2GB sucks when compared to classic IOS
@2GB RAM.


RP2's are 64-bit, so we get more for IOSd:
cisco ASR1004 (RP2) processor with *4231052K/6147K* bytes of memory.
8388608K bytes of physical memory.

Then again, 64-bit memory allocations need much more memory.


I do run ASR1002-RP1s with software redundancy disabled and a single view
in a Layer 3 VPN without problems, however I'm not sure if we would get
full TAC support for this setup.

You definitely cannot run a full view on a 64-bit ASR1k platform with only
4GB of physical RAM.



Regards,

Lukas


[1] http://www.cisco.com/c/en/us/support/docs/routers/asr-1000-series-aggregation-services-routers/116233-technote-product-00.html#anc3