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adding more T1's, do i need to upgrade memory

I have a 3725 with 4 t1's and we currently have 132 mb of DRAM. We will be adding another 4 T1's by adding first 2 2port wic cards.

Should we upgrade our RAM on the router??

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Hall of Fame Super Silver

Re: adding more T1's, do i need to upgrade memory

Shir

I certainly support being proactive in things like this. The output shows plenty of free memory. I would not think that you particularly need to add memory to accommodate additional T1s.

HTH

Rick

4 REPLIES
Hall of Fame Super Silver

Re: adding more T1's, do i need to upgrade memory

Shir

When you add additional interfaces it will require some memory for interface data structures and buffering of traffic in and out of those interfaces. And additional interfaces will probably result in higher volume of traffic being forwarded which might impact memory usage.

But addiing more T1s does not automatically mean that you need to upgrade memory. What is the memory utilization in the router currently? If you are running high on memory utilization already then it would make good sense to upgrade memory before doing the interface addition. But if there is currently plenty of available memory then you should be able to add T1s without requiring a memory upgrade.

HTH

Rick

New Member

Re: adding more T1's, do i need to upgrade memory

Please let me know if this will show the memory utilization. We never had a memory utilziation problem. Just trying to be proactive.

--------------------------

SGS-B-RT-NET-QWEST#show proc mem

Total: 100507616, Used: 28721308, Free: 71786308

PID TTY Allocated Freed Holding Getbufs Retbufs Process

0 0 206780 55980 5231520 0 0 *Init*

0 0 500 623710700 500 0 0 *Sched*

0 0 313507088 390489756 23856 205076 960 *Dead*

1 0 0 0 6852 0 0 Chunk Manager

------------------------------

SGS-B-RT-NET-QWEST#show mem

Head Total(b) Used(b) Free(b) Lowest(b) Largest(b

Processor 61743020 100507616 28727028 71780588 71206404 7021820

I/O 7700000 9437184 4902976 4534208 3726776 439081

--More--

-----------------------------

cisco 3725 (R7000) processor (revision 0.1) with 121856K/9216K bytes of memory.

Hall of Fame Super Silver

Re: adding more T1's, do i need to upgrade memory

Shir

I certainly support being proactive in things like this. The output shows plenty of free memory. I would not think that you particularly need to add memory to accommodate additional T1s.

HTH

Rick

Hall of Fame Super Silver

Re: adding more T1's, do i need to upgrade memory

Shir

I am glad that my answer was able to help you resolve your question. Thank you for using the rating system to indicate that your question was resolved (and thanks for the rating). It makes the forum more useful when people can read a question and can know that they will read a response which resolved the question.

The forum is an excellent way to learn about Cisco networking. I encourage you to continue your participation in the forum.

HTH

Rick

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