[AusNOG] High availability options for terminating point-to-point Ethernet (on Cisco CE)

Simon Dixon simon at dicko.net.au
Fri May 26 09:05:59 EST 2017

Have a look at Juniper's MX5/MX80 platform.

I've set it up in two ways to do what you need, both with around 1 second
failover time when a router fails or is taken out of service.

The first being MLAG between 2 x MX5/MX80 routers with the customer
interfaced terminated in a irb. (SVI for Cisco people)

The second is to use VPLS,  you can put the customer VLAN into a VPLS
circuit with the same site id and weight one router as primary and the
other as backup,  and then place a irb interface into this for the
customers L3 services.

As its two physical routers you don't need to worry about chassis failures
if you go for that option with multiple RE's/Linecards, and with VPLS the
Routers don't even need to be in the same DC, which is nice if you have 2
head ends for HA from the wholesale ethernet provider.


On 25 May 2017 at 18:51, Matt Selbst <matt.j.selbst at gmail.com> wrote:

> Yes indeed I'm talking about the aggregation router failing.
> Perhaps clustering multiple chassis although I don't know any Cisco agg
> routers that can do that.
> On Thu, May 25, 2017 at 8:46 PM, Sam Silvester <sam.silvester at gmail.com>
> wrote:
>> Hi Matt,
>> On Thu, May 25, 2017 at 8:05 PM, Matt Selbst <matt.j.selbst at gmail.com>
>> wrote:
>>> Hi,
>>> Hoping for some advice. What is everyone doing for
>>> terminating point-to-point Ethernet services like AAPT's e-Line in a high
>>> availability environment? Cisco environment.
>>> With PPPoE, high availability was much easier as you could just have
>>> multiple LNS's and failover easily when the client would re-auth. With
>>> terminating a VLAN handoff on a /30 or /31 it makes HA much harder. If the
>>> customer edge router dies, failover seems pretty hard. VRRP doesn't seem to
>>> be an option especially with hundreds of customer sub-interfaces.
>> Do you mean HA on the customer side or on your side?
>> e.g. I assume you mean you want to protect against when your aggregation
>> router dies, as obviously the P2P Ethernet service is kind of a single
>> point of failure in and of itself, as is the CPE...
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