RE: Re: Layer 2 MPLS VPN

Some thoughts on this thread -

LDP signaling provides more flexibility for VPLS because it allows different characteristic setting per PW such as:
•

–1. QoS setting – e.g., different PWs can have different reserved BW and if needed the BW can be adjusted dynamically (based on time of day). Also congestion management requires feedback for a PtP link

2. Sequencing: Sequencing is a PtP operation in nature. Sequence numbers among different PtP can have different “start” values. Also re-synching of sequence numbers are PtP operation. Furthermore, sequencing can be turned on/off on a per PW basis and allowing the operator finer control over it.

3. OAM: It is important to be able to check the health status of each PW separately because one PW may affect the status of the whole set (Emulated VLAN)

4. Data-plane failure: there can be scenarios where an operator may want to reset a PW (bring down and up). In such cases, a new label is desired to be assigned (in case there is an issue with the label itself). This is inherently done with LDP protocol; whereas with BGP protocol and label-block scheme the same label gets assigned over and over again.

With regards,

Vinod Joseph

Puddinhead Wilson <puddinghead_wilson007@yahoo.co.uk> wrote:

Funny though most of the thoughts on why BGP is better
is coming from people who actually run these networks.
:)

(For example I known VSNL is considerably huge in
size)

At the end of the day, if providers with the greater
chunk of fibre support BGP, it will be BGP.

And providers with the greater chunk of fibre will
support BGP as BGP scales :), you cant argue with that
logic can you :) ??

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RE: Re: Layer 2 MPLS VPN