ARP,Bridge, and DHCP-1

University of Babylon, IT College
Information Network Dep., Third Class, Second Semester
MTCNA Course
MikroTik Certified Network Associate
2015-2016
By M.Sc. I.T Alaa A. Mahdi
• ARP
• RouterOS ARP table
• DHCP SERVER AND CLIENT
ARP
Address Resolution Protocol
https://www.youtube.com/watch?v=1jncvd6JDoc
The Address Resolution Protocol is a
request and reply protocol. It is
communicated within the boundaries
of a single network, never routed
across internetwork nodes. This
property places ARP into the Link
Layer of the Internet Protocol Suite.
/ip arp
• Even though IP packets are addressed using IP
addresses, hardware addresses must be used to
actually transport data from one host to another.
Address Resolution Protocol is used to map OSI
level 3 IP addresses to OSI level 2 MAC
addresses. Router has a table of currently used ARP
entries. Normally the table is built dynamically, but
to increase network security, it can be partially or
completely built statically by means of adding static
entries.
1- Disabled
• If ARP feature is turned off on the
interface ,i.e., arp=disabled is used, ARP
requests from clients are not answered by
the router. Therefore, static arp entry
should be added to the clients as well.
• For example, the router s IP and MAC
addresses should be added to the Windows
workstations (PC) using the arp command :
• C:\> arp -s 10.5.8.254 00-aa-00-62-c6-09