[j-nsp] Vlan question MX

[joel jaeggli]

On 7/8/13 3:00 PM, Tom Storey wrote:
> The thing thats confusing me is, who on earth presents a service to a
> customer as a tagged service? Ive never come across such a thing.
entirely appart from the case of metro-e/pbb/spb if you're doing L2 or 
L3 vpn, on the PE you can differentiate between tunnels/services 
provided to the customer by helpfully tagging them with a vlan-id.
> If you're plugged in to a router interface on the providers side, why is
> there a need to add VLAN tagging on top? Similarly, if you're plugged in to
> a switch, normally the switch port is just an access port, not a trunk.
>
> Someone help me out here... :-)
>
>
> On 8 July 2013 22:47, Michael Loftis <mloftis at wgops.com> wrote:
>
>> vlan-tagging tells JunOS to treat the interface as multiple separate
>> L3 interfaces, identified by VLAN ID.  Their end is almost certainly
>> similarly configured (maybe as a MPLS PE)
>>
>> On Mon, Jul 8, 2013 at 10:26 AM, Keith <kwoody at citywest.ca> wrote:
>>> Have this setup in the lab on some srx's but want to get some info
>>> on this.
>>>
>>> We have an upstream provider that we use a config:
>>>
>>> set interfaces ge-0/1/0 vlan-tagging
>>> set interfaces ge-0/1/0 encapsulation flexible-ethernet-services
>>> set interfaces ge-0/1/0 unit 1500 vlan-id 1500
>>> set interfaces ge-0/1/0 unit 1500 family inet address x.x.x.x/30
>>>
>>>
>>> We are turning up a second connection to them that will be terminated on
>> a
>>> 10G
>>> link and want us to use the same thing, vlan 1500, just a different IP
>>> address.
>>>
>>> Will this cause a problem by having the same vlan id on both links to the
>>> same provider? (I am guessing we are being terminated on different
>> routers
>>> on their side).
>>>
>>> My lab router didn't complain so I'm guessing its probably ok.
>>>
>>> Thanks,
>>> Keith
>>>
>>> _______________________________________________
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>>
>>
>> --
>>
>> "Genius might be described as a supreme capacity for getting its possessors
>> into trouble of all kinds."
>> -- Samuel Butler
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