The MPLS WG Archive

Cell Relay Retreat>MPLS WG Archive>month:2002-Jan> msg00023



[Date Prev][Date Next][Thread Prev][Thread Next]  
  [Date Index][Thread Index][Author Index][Subject Index]

Some questions on HA

  • From: "David Allan"<dallan@nortelnetworks.com>
  • Date: Mon, 7 Jan 2002 10:29:18 -0500

Hi Sumesh:
 
FIS and FRS are not defined anywhere. The draft assumed that such capability was required and described it in generalized terms (for example, reading the definition it could be somthing on the user plane or control plane).
 
The closest functional equivalent to FIS/FRS on the user plane is the CV/FDI/BDI currently proposed in the ITU-T Y.1711 work. FDI/BDI (forward and backward defect indication) are the equivalent to FIS, and rules exist for handling CV whereby failure and recovery would be determined (there is no explicit "it has been fixed" message).
 
cheers
Dave
-----Original Message-----
From: sumeshkp [mailto:sumeshkp@netbrahma.com]
Sent: Monday, January 07, 2002 8:25 AM
To: mpls@UU.NET
Subject: Some questions on HA

hi all,

i have some quick questions on high availability for MPLS. it will be great if any one can answer this for me

assumption: we are considering only data plane redundancy.

1. what is the format of FIS and FRS (not to be found in any contermporary drafts)
2. can the "root" be outside the PML, IOW can root be outside the protection domain configured?
3. should PSL always terminate the FIS or can it be extended over to the Ingress
 

thank you very much,
warm regards,
sumesh 

-- 
           \\\///             | Url  : http://www.netbrahma.com     |
          netbrahma           | Phone: +91-80-552-1452 X 263 (work) |
           ///\\\             |        +91-80-534-2165 (home)       |
Internext Networking Software | Fax  : +91-80-553-7533              |