3850 replace 3560 for BGP

[jmecklenburg]

Hi
I have a Cisco 3560 as core in a small office, this site, get a default route to main site from EIGRP, and the main site have a BGP to connect with all sites.

For a change in a topology we need recibe all the BGP table redistribute from EIGRP and the 3560 can't handle all the routes. A Cisco 3850 it's ok for this topology?

Regards

[Leo Laohoo]

3850 has 2 Gb of flash and I don't believe this is adequate enough to hold and store the complete BGP routing table.

[jmecklenburg]

But for BGP operation the routing table is storage in a DRAM not in flash a 3850 have 4G in a DRAM for the 48 ports model.

Regards 

[johnd2310]

Hi,

How many bgp routes are you looking at?

Thanks

John

[jmecklenburg]

The show ip route summary in the main site show the following

IP routing table name is default (0x0)
IP routing table maximum-paths is 8
Route Source    Networks    Subnets     Replicates  Overhead    Memory (bytes)
connected       0           31          0           1860        5580
static          2           10          0           720         2160
eigrp 1         0           0           0           0           0
bgp 65056       30          459         0           29340       88020
  External: 487 Internal: 0 Local: 2
eigrp 25        0           10          0           840         1800
internal        29                                              27500
Total           61          510         0           32760       125060

Regards

[jmecklenburg]

Any idea?

Please help.

[vivek srivastava]

Hi,

If you are looking for complete internet routing table then currently it is approx 550k.

Now as per Cisco datasheet of 3850 - its supports only 24k which includes Total number of IPv4 routes (ARP plus learned routes).

So anyway it is (3850) not a good choice if not doing any kind of route aggregation or default routing at/to main site. Other wise you need to look for high end models with SUP2T etc.

Vivek

[jmecklenburg]

it's not a full internet routing table, it's a internal WAN, just 30 network and 500 subnet aprox 88K as can see in the main site.

[vivek srivastava]

For 30 network and 500 subnet , 3850 is more than enough. 

[rosaho]

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