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

[Ryan Tucker]

I'd be interested in an answer to this as well.

The ASR1006 apparently does multiple physical route processors with fast
failover for seemingly this purpose, but I'm not aware of anything
smaller/cheaper/more vendor agnostic (and VRRP just doesn't scale to "many"
interfaces as mentioned above).


On Thu, 25 May 2017 at 21:05 Sam Silvester <sam.silvester at gmail.com> wrote:

> Doesn't give you a specific answer so apologies if not useful to your
> situation but in past teams I've seen the following kind of things done.
>
> - We matched the customer SLA to the 'lowest common denominator' of the
> access link, or the aggregation router (generally we had 24x7x4 hour
> hardware replacement, so we doubled that to give time to install and
> reconfigure e.g. 8 hours restoration ETA). Often there was a switching
> layer between the assorted backhaul providers and the aggregation PE so the
> option also existed to re-provision customers but that was never really
> something we planned to do.
>
> - We ran multiple boxes, so we spread the impact of hardware outages (and
> upgrades). If a customer wanted higher availability, we provisioned them
> two links on two different aggregation boxes and ran HSRP or BGP sessions
> with them.
>
> Single boxes failing wasn't something that kept me up at night to be
> honest, it's empirical but we had more failures with backhaul providers and
> customer premises losing power than we ever had routers shit themselves in
> either a hardware or software fashion. We tended to not run lots of
> complicated features on the one box, again we tended to build out at least
> a pair of aggregation edge devices for each type of service (PPP,
> colocation, business services etc)
>
>
> Sam
>
>
> On Thu, May 25, 2017 at 8:21 PM, 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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