[mpls-linux-general] local address

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Hi James,

Today's mail reminds me to ask you a question about "local host address"

See your figure:

Example:
             10.0.1.0/24           10.0.2.0/24
    ------- .1         .2 ----- .2            .3 -------
   | LER A |-------------| LSR |----------------| LER B |
    ------- eth1     eth1 ----- eth2        eth1 -------
      lo0                  lo0                    lo0
   1.1.1.1/32           2.2.2.2/32             3.3.3.3/32

     -------------- flow of packets ------------->

In your example, there is a local host address for each router(such as 
1.1.1.1, 2.2.2.2...). I remember one thing: when you do LDP, you need "add 
global <ip for lsrid>" here <ip for lsrid> means "local host address", I am 
not sure whether I am right or not. Now question:

1. Usually lo is "127.0.0.1", Can I assign any ip address for lo? What 's 
the purpose? What's the relation with the ip address of each NIC(such as 
10.0.1.1)?
2. When I do LDP, I must assign different lo ip address for each router, 
because here it is used for identifying the different router. Am I right? 
Please give me help.

Thanks,

jenny,

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