Re: In network bonding second nic (eth1) is not pingable while first one (eth0) is always pingable"

[deloptes <deloptes@gmail.com>]

Jaikumar Sharma wrote:

> Thank you for pointers, this is a test switch at home but of course
> we have bigger Cisco switches at office which have management interface.
> It look like LACP needs to be checked/enabled on ports which needs to
> be used in network bonding.

Note that LACP is not "active backup" (mode 1) which you have shown in your
configuration. LACP is called Dynamic Link Aggregation (mode 4).
There are 6 types of bonding explained for example here
https://thelinuxcluster.com/2010/01/08/linux-bonding-modes/

All of them configure and behave differently. The peer in case of LACP also
has to be configured accordingly.

I have not done this in debian, but on Red Hat it needed some manual
configuration of the ETHTOOL options for the network devices, so that it
works properly.