BGP Dual-homing using 2 x CCR1016-12G or just one CLOUD CORE CCR1036-12G-4S-EM. What would you do?

RouterOS Forwarding Protocols
1

Hi Guys, first post here.

We’re attempting a dual home configuration between two ISP. We have just received our own public AS and a /22 (splited in 2x23) by LACNIC

Having the options, what would you use?

  • A couple of “CCR1016-12G” , each peering with a single ISP
  • Just one “CLOUD CORE CCR1036-12G-4S-EM” peering with both

Thanks in advance.

2

For me, it would depend on several things.

In general, the pros/cons are that a single router is easier to manage and produces less configuration complexity in your network’s design, but it leads to a single point of failure being the router itself. Generally, though, the circuits and other external factors are much more likely to be the source of problems than the failure of a router itself.

Personally, I prefer multiple independent border routers,

3

We are using several CCR for years in multi provider BGP setup and believe me you don’t want to depend on a single ccr for your whole uplink.

4

Thanks for the answer Zerobyte. What about resources/capacity, would it take a full route and 100Mbps from each ISP ?

5

Easily routes 100Mbit/sec - but be careful how lots of rules in /ip firewall filter etc might impact performance.

Full routing tables: on CCR it takes maybe 5 minutes to converge. You’ll notice that if one of your upstreams drops their circuit without taking BGP down gracefully (and giving you a few minutes’ grace for your CCRs to update their routing tables). Just be sure to have 2Gb or more of RAM - 1Gb with two transit providers is… not fun.

6

No worries maznu, I’ll have one CCR1016-12G for each ISP.