Re: [j-nsp] MPLS Endpoint Discussion

2015-07-03 Thread Alexander Arseniev



On 03/07/2015 01:45, Ben Dale wrote:
Always use loopbacks - if the link goes down (or the preceding node), 
the destination of the LSP goes with it - Junos will not maintain 
prefixes for downed interfaces. You mention this being a ring - if you 
target the LSP to a loopback, your IGP will provide an alternative 
path after a failure. 
Sometimes it is a feature - more than once I have come across a request 
for if it fails, it fails type of service meaning cheap nonresilient 
connection.
And LSPs destined to link IPs and coupled with strict EROs fit such 
requirement nicely, but I digress...

HTH
Thanks
Alex
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[j-nsp] MPLS Endpoint Discussion

2015-07-02 Thread Levi Pederson
All,

I've created simpler MPLS ring between a total of 6 MPLS 4550s.  My
questions what IP do I use for the Label Switched Path Endpoints. I can't
seem to find a best practice.

Specifically this code

Obfuscated as I'm a little to literal with my descriptions

set protocols mpls label-switched-path PE2-to-PE1 to 10.254.1.1
set protocols mpls label-switched-path PE2-to-PE3 to 10.254.1.6
set protocols mpls label-switched-path PE2-to-PE4 to 10.254.0.4


Do I use the /30 that exists between the Legs?

Or should I use the LoopBack0 ?

My thought would be Leg itself as it creates the path.  But some documents
state LoopBack.


Thank you,

*Levi Pederson*
Mankato Networks LLC
cell | 612.481.0769
work | 612.787.7392
levipeder...@mankatonetworks.net
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Re: [j-nsp] MPLS Endpoint Discussion

2015-07-02 Thread Antonio Sanchez-Monge
loopbacks

On 7/2/15, 4:25 PM, juniper-nsp on behalf of Levi Pederson
juniper-nsp-boun...@puck.nether.net on behalf of
levipeder...@mankatonetworks.net wrote:

All,

I've created simpler MPLS ring between a total of 6 MPLS 4550s.  My
questions what IP do I use for the Label Switched Path Endpoints. I can't
seem to find a best practice.

Specifically this code

Obfuscated as I'm a little to literal with my descriptions

set protocols mpls label-switched-path PE2-to-PE1 to 10.254.1.1
set protocols mpls label-switched-path PE2-to-PE3 to 10.254.1.6
set protocols mpls label-switched-path PE2-to-PE4 to 10.254.0.4


Do I use the /30 that exists between the Legs?

Or should I use the LoopBack0 ?

My thought would be Leg itself as it creates the path.  But some documents
state LoopBack.


Thank you,

*Levi Pederson*
Mankato Networks LLC
cell | 612.481.0769
work | 612.787.7392
levipeder...@mankatonetworks.net
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Re: [j-nsp] MPLS Endpoint Discussion

2015-07-02 Thread Ben Dale


 On 3 Jul 2015, at 12:25 am, Levi Pederson levipeder...@mankatonetworks.net 
 wrote:
 
 All,
 
 I've created simpler MPLS ring between a total of 6 MPLS 4550s.  My
 questions what IP do I use for the Label Switched Path Endpoints. I can't
 seem to find a best practice.
 
 Specifically this code
 
 Obfuscated as I'm a little to literal with my descriptions
 
 set protocols mpls label-switched-path PE2-to-PE1 to 10.254.1.1
 set protocols mpls label-switched-path PE2-to-PE3 to 10.254.1.6
 set protocols mpls label-switched-path PE2-to-PE4 to 10.254.0.4
 
 
 Do I use the /30 that exists between the Legs?
 
 Or should I use the LoopBack0 ?
 
 My thought would be Leg itself as it creates the path.  But some documents
 state LoopBack.

Always use loopbacks - if the link goes down (or the preceding node), the 
destination of the LSP goes with it - Junos will not maintain prefixes for 
downed interfaces.  

You mention this being a ring - if you target the LSP to a loopback, your IGP 
will provide an alternative path after a failure.

Cheers,

Ben
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