My big worry is about, when a single link under a bond breaks, it breaks hardly 
such that the whole bond does not work.

How to make it "failover" in such cases?


best regards,

samuel



huxia...@horebdata.cn
 
From: Anthony D'Atri
Date: 2021-06-15 18:22
To: huxia...@horebdata.cn
Subject: Re: [ceph-users] Issues with Ceph network redundancy using L2 MC-LAG
Which hash mode are you using on the hosts?  layer 3+4 ?  Are they set up 
active/active, or active/passive?
 
I often see suboptimal bonding configurations that result in most or all 
traffic going over only one ilnk.
 
 
 
> On Jun 15, 2021, at 9:19 AM, huxia...@horebdata.cn wrote:
> 
> Dear Cephers,
> 
> I encountered the following networking issue several times, and i wonder 
> whether there is a solution for networking HA solution.
> 
> We build ceph using L2 multi chassis link aggregation group (MC-LAG ) to 
> provide switch redundancy. On each host, we use 802.3ad, LACP  
> mode for NIC redundancy. However, we observe several times, when a single 
> network port, either the cable, or the SFP+ optical module fails, Ceph 
> cluster  is badly affected by networking, although in theory it should be 
> able to tolerate.
> 
> Did i miss something important here? and how to really achieve networking HA 
> in Ceph cluster?
> 
> best regards,
> 
> Samuel
> 
> 
> 
> 
> huxia...@horebdata.cn
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