Manual:IP/Neighbor discovery: Difference between revisions

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==Overview==
{{Versions| v5 +}}
RouterOS supports MikroTik neighbour discovery that can be configured in ''/ip neighbor discovery'' information received from broadcast messages sent by other routers that are compatible with MikroTik neghbor discovery protocol is displayed under ''/ip neighbor''
 
==Requirements==
__TOC__
This is part of system package and no additional packages are not necessary. To broadcast and process discovery information interfaces should be set to do so under ''/ip neighbor discovery''
 
==Summary==
 
MikroTik Neighbor Discovery protocol (MNDP) and LLDP allows to "find" other devices compatible with MNDP or CDP (Cisco Discovery Protocol) or LLDP  in Layer2 broadcast domain.
 
==Neigbours==
==Neigbours==


'''Menu: ''/ip neigbor'''''
<p id="shbox"><b>Sub-menu:</b> <code>/ip neighbor</code></p>
 
 
This sub-menu lists all discovered neighbours in Layer-2 broadcast domain. It shows to which interface neighbour is connected, shows its IP/MAC addresses and several MikroTik related parameters. List is read-only.
 
Starting from ROS v6.45 amount of neighbour entries are limited to (total RAM in megabytes)*16 per interface to avoid memory exhaustion.
 
As an example, you can see several RouterBoards and two Cisco routers:
<pre>
[admin@MikroTik] /ip neighbor> print
# INTERFACE ADDRESS        MAC-ADDRESS      IDENTITY  VERSION    BOARD     
0 ether13  192.168.33.2    00:0C:42:00:38:9F MikroTik  5.99      RB1100AHx2
1 ether11  1.1.1.4        00:0C:42:40:94:25 test-host  5.8        RB1000 
2 Local    10.0.11.203    00:02:B9:3E:AD:E0 c2611-r1  Cisco I...                   
3 Local    10.0.11.47      00:0C:42:84:25:BA 11.47-750  5.7        RB750 
4 Local    10.0.11.254    00:0C:42:70:04:83 tsys-sw1  5.8        RB750G   
5 Local    10.0.11.202    00:17:5A:90:66:08 c7200      Cisco I...
</pre>
 
 
'''Properties'''
 
 
{{Mr-arg-table-h
|prop=Property
|desc=Description
}}
 
{{Mr-arg-ro-table
|arg=address
|type=IP
|desc=Highest IP address configured on a discovered device
}}
 
{{Mr-arg-ro-table
|arg=address6
|type=IPv6
|desc=IPv6 address configured on a discovered device
}}
 
{{Mr-arg-ro-table
|arg=age
|type=time
|desc=Time interval since last discovery packet
}}


In this menu is read-only and displays discovery information from routers in same Layer-2 area where interface is set to participate in neighbour discovery.
{{Mr-arg-ro-table
|arg=board
|type=string
|desc=RouterBoard model. Displayed only to devices with installed RouterOS
}}


{| cellpadding="2"
{{Mr-arg-ro-table
!width="300px" style="background:#cccccc; border-bottom:1px solid gray;"| Property
|arg=identity
!width="450px" style="background:#cccccc; border-bottom:1px solid gray;"| Desciption
|type=string
|-
|desc=Configured system identity
|style="border-bottom:1px solid gray;" valign="top"|interface (<em>interface name</em>)
}}
|style="border-bottom:1px solid gray;" valign="top"|interface that received discovery packet from other hosts in Layer-2 area
 
|-
{{Mr-arg-ro-table
|style="border-bottom:1px solid gray;" valign="top"|address (<em>IP address</em>)
|arg=interface
|style="border-bottom:1px solid gray;" valign="top"|IP address of the neighbour interface discovery packet originated from
|type=string
|-
|desc=Interface name to which discovered device is connected
|style="border-bottom:1px solid gray;" valign="top"|mac-address (<em>MAC address</em>)
}}
|style="border-bottom:1px solid gray;" valign="top"|mac address of the neighbour interface discovery packet originated from
 
|-
{{Mr-arg-ro-table
|style="border-bottom:1px solid gray;" valign="top"|identity (<em>text</em>)
|arg=interface-name
|style="border-bottom:1px solid gray;" valign="top"|set identification tag of system sending out discovery information
|type=string
|-
|desc=Interface name on the neighbor device connected to the L2 broadcast domain. Applies to CDP.
|style="border-bottom:1px solid gray;" valign="top"|platform (<em>text</em>)
}}
|style="border-bottom:1px solid gray;" valign="top"|platform of system sending out discovery information
 
|-
{{Mr-arg-ro-table
|style="border-bottom:1px solid gray;" valign="top"|version (<em>text</em>)
|arg=ipv6
|style="border-bottom:1px solid gray;" valign="top"|version of software of system sending out discovery information
|type=yes {{!}} no
|-
|desc=Shows whether device has IPv6 enabled.
|style="border-bottom:1px solid gray;" valign="top"|unpack (<em>none|simple|uncompressed-headers|uncompressed-all</em>)
}}
|style="border-bottom:1px solid gray;" valign="top"|what packet compression is used by neighbour system
 
|-
{{Mr-arg-ro-table
|style="border-bottom:1px solid gray;" valign="top"|age (<em>time</em>)
|arg=mac-address
|style="border-bottom:1px solid gray;" valign="top"|time that has passed since last discovery packet was received from neighbour
|type=MAC
|-
|desc=Mac address of remote device. Can be used to connect with mac-telnet.
|style="border-bottom:1px solid gray;" valign="top"|uptime (<em>time</em>)
}}
|style="border-bottom:1px solid gray;" valign="top"|uptime of system sending discovery information
 
|-
{{Mr-arg-ro-table
|style="border-bottom:1px solid gray;" valign="top"|software-id (<em>text</em>)
|arg=platform
|style="border-bottom:1px solid gray;" valign="top"|Software id of neighbour system that sends out discovery information
|type=string
|}
|desc=Name of the platform. For example "MikroTik", "cisco" ... etc.
}}
 
{{Mr-arg-ro-table
|arg=software-id
|type=string
|desc=RouterOS software ID on a remote device. Applies only to devices installed with RouterOS.
}}
 
 
{{Mr-arg-ro-table
|arg=system-caps
|type=string
|desc=System capabilities reported by the Link-Layer Discovery Protocol (LLDP).
}}
 
{{Mr-arg-ro-table
|arg=system-caps-enabled
|type=string
|desc=Enabled system capabilities reported by the Link-Layer Discovery Protocol (LLDP).
}}
 
{{Mr-arg-ro-table
|arg=unpack
|type=none{{!}}simple{{!}}uncompressed-headers{{!}}uncompressed-all
|desc=Shows discovery packet compression type.
}}
 
{{Mr-arg-ro-table
|arg=uptime
|type=time
|desc=Uptime of remote device. Shown only to devices installed with RouterOS.
}}
 
 
{{Mr-arg-ro-table-end
|arg=version
|type=string
|desc=Version number of installed software on a remote device
}}


==Discovery configuration==
==Discovery configuration==
{| cellpadding="2"
 
!width="300px" style="background:#cccccc; border-bottom:1px solid gray;"| Property
<p id="shbox"><b>Sub-menu:</b> <code>/ip neighbor discovery-settings</code></p>
!width="450px" style="background:#cccccc; border-bottom:1px solid gray;"| Desciption
 
|-
 
|style="border-bottom:1px solid gray;" valign="top"|
In this menu is possible to change state of the interface whether it participates in neighbor discovery or not. If it does, it will send out basic information about system and process received discovery packets broadcasted in Layer-2 network. List of interfaces is automatically managed by RouterOS. Items in the list cannot be removed nor added. Default settings depend on interface type and current state.
|style="border-bottom:1px solid gray;" valign="top"|
 
|}
Removing an interface from this menu configuration will disable both the discovery of neighbours on this interface, and also the possibility of discovering this device itself on that interface.
[[Category:Manual]] [[Category:IP]][[Category:Unfinished]]
 
{{Mr-arg-table-h
|prop=Property
|desc=Description
}}
 
{{Mr-arg-table-end
|arg=discover-interface-list
|type=string
|default=!dynamic
|desc=Interface list on which members the discovery protocol will run on
}}
 
==LLDP==
 
RouterOS sends out:
 
Chassis subtype (MAC)
 
* Port subtype (interface name)
* TTL
* System name (system identity)
* Sys description ({platform} RouterOS {osvers} {boardName})
* All IP addresses on configured on the port
 
RouterOS accepts and processes:
 
* identity (LLDP_TYPE_SYS_NAME)
* interfaceName (depending on the priority, if one is empty checks the next: LLDP_TYPE_CHASSIS_ID, LLDP_TYPE_PORT_ID, LLDP_TYPE_PORT_DESC)
* ip4 (first entry of IPv4 LLDP_TYPE_MANAGEMENT_ADDR)
* ip6 (first entry of IPv6 LLDP_TYPE_MANAGEMENT_ADDR)
* TTL (LLDP_TYPE_TTL)
* MAC (Source - 6-11 byte)
 
{{cont}}
 
 
[[Category:Manual|N]]
[[Category:IP|N]]

Revision as of 06:09, 3 April 2019

Version.png

Applies to RouterOS: v5 +

Summary

MikroTik Neighbor Discovery protocol (MNDP) and LLDP allows to "find" other devices compatible with MNDP or CDP (Cisco Discovery Protocol) or LLDP in Layer2 broadcast domain.

Neigbours

Sub-menu: /ip neighbor


This sub-menu lists all discovered neighbours in Layer-2 broadcast domain. It shows to which interface neighbour is connected, shows its IP/MAC addresses and several MikroTik related parameters. List is read-only.

Starting from ROS v6.45 amount of neighbour entries are limited to (total RAM in megabytes)*16 per interface to avoid memory exhaustion.

As an example, you can see several RouterBoards and two Cisco routers:

[admin@MikroTik] /ip neighbor> print 
 # INTERFACE ADDRESS         MAC-ADDRESS       IDENTITY   VERSION    BOARD      
 0 ether13   192.168.33.2    00:0C:42:00:38:9F MikroTik   5.99       RB1100AHx2
 1 ether11   1.1.1.4         00:0C:42:40:94:25 test-host  5.8        RB1000   
 2 Local     10.0.11.203     00:02:B9:3E:AD:E0 c2611-r1   Cisco I...                    
 3 Local     10.0.11.47      00:0C:42:84:25:BA 11.47-750  5.7        RB750  
 4 Local     10.0.11.254     00:0C:42:70:04:83 tsys-sw1   5.8        RB750G    
 5 Local     10.0.11.202     00:17:5A:90:66:08 c7200      Cisco I...


Properties


Property Description
address (IP) Highest IP address configured on a discovered device
address6 (IPv6) IPv6 address configured on a discovered device
age (time) Time interval since last discovery packet
board (string) RouterBoard model. Displayed only to devices with installed RouterOS
identity (string) Configured system identity
interface (string) Interface name to which discovered device is connected
interface-name (string) Interface name on the neighbor device connected to the L2 broadcast domain. Applies to CDP.
ipv6 (yes | no) Shows whether device has IPv6 enabled.
mac-address (MAC) Mac address of remote device. Can be used to connect with mac-telnet.
platform (string) Name of the platform. For example "MikroTik", "cisco" ... etc.
software-id (string) RouterOS software ID on a remote device. Applies only to devices installed with RouterOS.
system-caps (string) System capabilities reported by the Link-Layer Discovery Protocol (LLDP).
system-caps-enabled (string) Enabled system capabilities reported by the Link-Layer Discovery Protocol (LLDP).
unpack (none|simple|uncompressed-headers|uncompressed-all) Shows discovery packet compression type.
uptime (time) Uptime of remote device. Shown only to devices installed with RouterOS.
version (string) Version number of installed software on a remote device

Discovery configuration

Sub-menu: /ip neighbor discovery-settings


In this menu is possible to change state of the interface whether it participates in neighbor discovery or not. If it does, it will send out basic information about system and process received discovery packets broadcasted in Layer-2 network. List of interfaces is automatically managed by RouterOS. Items in the list cannot be removed nor added. Default settings depend on interface type and current state.

Removing an interface from this menu configuration will disable both the discovery of neighbours on this interface, and also the possibility of discovering this device itself on that interface.

Property Description
discover-interface-list (string; Default: !dynamic) Interface list on which members the discovery protocol will run on

LLDP

RouterOS sends out:

Chassis subtype (MAC)

  • Port subtype (interface name)
  • TTL
  • System name (system identity)
  • Sys description ({platform} RouterOS {osvers} {boardName})
  • All IP addresses on configured on the port

RouterOS accepts and processes:

  • identity (LLDP_TYPE_SYS_NAME)
  • interfaceName (depending on the priority, if one is empty checks the next: LLDP_TYPE_CHASSIS_ID, LLDP_TYPE_PORT_ID, LLDP_TYPE_PORT_DESC)
  • ip4 (first entry of IPv4 LLDP_TYPE_MANAGEMENT_ADDR)
  • ip6 (first entry of IPv6 LLDP_TYPE_MANAGEMENT_ADDR)
  • TTL (LLDP_TYPE_TTL)
  • MAC (Source - 6-11 byte)

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