Can someone let me know what is mangement IP and internal IP in Avamar

This will vary with the particular hardware configuration of your Avamar grid.  What version do you have?  Gen 3?  Gen 4S?

Thanks!

Avamar version is 7.3 and Hardware version GEN 4S M1200

You can use the UNIX ethtool command.  Login as admin and su to root.  Then, you can run ethtool against any interface (typically named eth0, eth1, etc.):

admin@bmhavautl:~/>: su

Password:

root@bmhavautl:/home/admin/#: ethtool eth0

Settings for eth0:

        Supported ports: [ TP ]

        Supported link modes:   10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Full

        Supports auto-negotiation: Yes

        Advertised link modes:  10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Full

        Advertised auto-negotiation: Yes

        Speed: 1000Mb/s

        Duplex: Full

        Port: Twisted Pair

        PHYAD: 1

        Transceiver: internal

        Auto-negotiation: on

        Supports Wake-on: umbg

        Wake-on: g

        Current message level: 0x00000003 (3)

        Link detected: yes

You'll note my interface above is running at 1Gbps, full-duplex. 

Let us know if that helps!