[VRRP] 答复: Re: vrrp faster backup

[liu.zhiwei1 at zte.com.cn]

Dear Arnab 

Thanks for your feedback.
Then when the priority value isn't zero,
the Backup Router should waiting the Master Router time out. 
Are they any other way when priority isn't
zero? 
 
Best Regards

Dash Liu　刘志伟　　　ID: 183475 Chief Engineer Office, Standard Development and Industry Relations
	Product Marketing System
	产品市场体系
D206, 889, Bibo Road,ZhangJiang, Pudong District, ShangHai P.R.China, 210023 Tel:+86-21-68896823/ 13701767991 Mobile:+86-13828760990 Email:liu.zhiwei1 at zte.com.cn

Arnab Bakshi <arnab.bakshi at gmail.com>

2009-07-06 20:52

收件人	liu.zhiwei1 at zte.com.cn, vrrp at ietf.org
抄送
主题	Re: [VRRP] vrrp faster backup

Hi Liu,

  As per RFC 3768, section 5.3.4 page 12:
     The priority
value zero (0) has special meaning indicating that the
     current Master has stopped participating in VRRP.  This
is used to
     trigger Backup routers to quickly transition to Master without
having
     to wait for the current Master to timeout.

This is one way I think if the master
router gracefully indicates the other routers in the network.

Regards
Arnab

2009/7/6 <liu.zhiwei1 at zte.com.cn>


Dear All 

I'm a new comer in IETF. 

VRRP [RFC 3768] specifies an election protocol that dynamically assigns
responsibility for a virtual router to one of the VRRP routers on a LAN.
This election process provides dynamic fail  over in the forwarding
responsibility should the Master become unavailable. 
    
The router survivability capability provided by the Virtual Router Redundancy
Protocol requirement: (3 * Master_Adver_Interval) + Skew_timer for  Backup
Router to declare Masterdown in the VRRP [RFC 3768].
It will be more than 3 second when the Master_Adver_Interval was 1 second.
In some LAN environments, the Backup Router needs faster method to declare
the Master Router is fail. 
As if (2 * Master_Adver_Interval) + Skew_timer or (1 * Master_Adver_Interval)
+ Skew_timer. 
Are there a message type which permits the Backup Router could backup faster?
  
Best Regards

Dash Liu　刘志伟　　　ID: 183475 Chief Engineer Office, Standard Development and Industry Relations
	Product Marketing System
	产品市场体系
D206, 889, Bibo Road,ZhangJiang, Pudong District, ShangHai P.R.China, 210023 Tel:+86-21-68896823/ 13701767991 Mobile:+86-13828760990 Email:liu.zhiwei1 at zte.com.cn

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