BGP on 3600 series

[mitchel]

Is it possible to run bgp and OSPF on a 3620 or 3640? How about on a 1700 series router?

Thanks,

Mitchel

[thisisshanky]

running bgp on any router, is a matter of concern, depending on how many routes you are subscribing from the ISP. If you are subscribing full Internet routes, you shud definitely use a 128 M ram on the 3600.Again OSPF consumes memory as well as CPU utilisation.....depending on the number of areas the router is in......and the number of LSAs..... I would recommend not to use the 1700 for BGP and OSPF...

[mitchel]

I have a 3620 and a 3640 and am debating wich to use. 3620 memory:

cisco 3620 (R4700) processor (revision 0x81) with 59392K/6144K bytes of memory. Which I guess means 64megs?

3640 memory:

cisco 3640 (R4700) processor (revision 0x00) with 91136K/7168K bytes of memory. 92 megs?

I have a 7206 as core router and am considering using the 3600 for failover.

Thanks,

Mitchel

[thisisshanky]

CPU speed wise, obviously....3640 is the best....also you have 32 megs extra ram on the 3640...so I would say use the 3640 instead of the 3620....Are you subscribing to full internet routes ???

[thisisshanky]

CPU speed wise, obviously....3640 is the best....also you have 32 megs extra ram on the 3640...so I would say use the 3640 instead of the 3620....Are you subscribing to full internet routes ???

[mitchel]

I am on the 7206 from 2 providers, and if I needed it for failover would I need full routes or possibly set default routes? Not sure. Could you explain to me how to determine amount of memory on the router. I understand the flash sizes, but if it says 91136K/7168K bytes of memory, than is the total 96megs?

Can't I increase this to 128?

cisco 3640 (R4700) processor (revision 0x00) with 91136K/7168K bytes of memory.

Processor board ID 10311061

R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

Bridging software.

X.25 software, Version 3.0.0.

SuperLAT software (copyright 1990 by Meridian Technology Corp).

2 Ethernet/IEEE 802.3 interface(s)

1 FastEthernet/IEEE 802.3 interface(s)

4 ATM network interface(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

16384K bytes of processor board PCMCIA Slot0 flash (Read/Write)

16384K bytes of processor board PCMCIA Slot1 flash (Read/Write)

[thisisshanky]

91136k/7168k - the first number is the amount of system ram, while the second number is the amount of mem allocated for storing IO packets...The ratio between the two can be controlled using memory-size iomem command in the global config mode, You will need to restart the router after executing this command, to see the mem value changes....I think the default is 25 percent....of total ram....

What you infer is correct, the total of both the numbers = system ram

91136 k = 89 Mb of RAM allocated for the system (used by CPU, processes, running IOS etc) 7168 k = 7 mb of ram allocated for packet storage...

89+7 = 96. You can increase this to 128....(thats the max you can add on a 3640.

[mitchel]

Thanks for your help.!