SwOS

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Summary

SwOS is an operating system designed specifically for administration of MikroTik Switch products.

SwOS is configurable from your web browser. It gives you all the basic functionality for a managed switch, plus more: Allows to manage port-to-port forwarding, apply MAC filter, configure VLANs, mirror traffic, apply bandwidth limitation and even adjust some MAC and IP header fields.

Connecting to the Switch

Management device should be on the same subnet as Switch. Open your web browser and enter IP address of your Switch (192.168.88.1 by default) and login screen will appear.

SwOS default IP address: 192.168.88.1, user name: admin and there is no password.

Note: MikroTik neighbor discovery protocol tools can be used to discover IP address of Mikrotik Switch. Manual:IP/Neighbor_discovery

Interface Overview

SwOS interface menu consists of 10 tabs: Link, Forwarding, Statistics, VLAN, VLANs, Static Hosts, Hosts, SNMP, ACL and System.

Description of buttons in SwOS configuration tool:

• Append - add new item to the end of the list
• Apply All - applies current configuration changes
• Cut - removes item from the list
• Clear - resets properties of the item
• Discard Changes - removes unsaved configuration
• Insert - add new item to the list (places it before current item)
• Sort - sort VLAN table by VLAN-IDs; sort host table by MAC addresses

• Change Password - changes password of the switch
• Logout - logout from current Switch
• Reboot - reboot the switch
• Reset Configuration - reset configuration back to factory defaults
• Choose File - browse for upgrade file
• Upgrade - upgrade firmware of the Switch

System Tab

System Tab performs the following functions:

• General information about Switch
• Switch management
• Configuration reset
• Firmware upgrade

File:Swos system.png

Property	Description
IP Address	IP address of the Switch
Identity	Name of the Switch
Allow From	IP address from which the service is accessible. Default value is '0.0.0.0/0' - any address.
Watchdog	Enable or disable system watchdog. It will reset CPU of the switch in case of fault condition
MAC Address	MAC address of the Switch (Read-only)
Version	Firmware version of the Switch
Uptime	Current Switch uptime

Link Tab

Link Tab allows you to:

• Configure Ethernet ports
• Monitor status of Ethernet ports

File:Swos link.png

Property	Description
Enabled	Enable or disable port
Link Status	Current link status (Read-only)
Auto Negotiation	Enable or disable auto negotiation
Speed	Specify speed setting of the port (requires auto negotiation to be disabled to specify)
Full Duplex	Specify duplex mode of the port (requires auto negotiation to be disabled to specify)
Crossover	Detect crossover cable (Read-only)
Flow control	Enable or disable flow control

Forwarding Tab

Forwarding Tab provides advanced forwarding options among switch ports, port locking, port mirroring, bandwidth limit and broadcast storm control features.

File:Swos forwarding.png

Property	Description
Forwarding	Forwarding table for enabling/disabling traffic forwarding between specific ports
Port Lock	Port Lock - Enable or disable MAC address learning on this port Lock On First - Enable or disable MAC address learning on this port (MAC address from the first recieved packet will still be learnt)
Port Mirroring	Mirror Ingress - Whether traffic entering this port must be copied and forwarded to mirroring target port Mirror Outgress - Whether traffic leaving this port must be copied and forwarded to mirroring target port Mirror To - Mirroring target port
Bandwidth Limit	Ingres Rate - Limit traffic entering this port (bps) Outgres Rate - Limit traffic leaving this port (bps)
Broadcast Storm Control	Storm Rate - Include Unicast -

Statistics Tab

Provides detailed information about received and transmitted packets.

File:Swos statistics.png

VLAN Tab

VLAN configuration for Switch ports.

File:Swos vlan.png

Property	Description
VLAN Mode	VLAN mode for certain port: disabled - optional - enabled - strict -
Default VLAN ID
Force VLAN ID
VLAN Header	leave as is - if VLAN header is present it remains unchanged always strip - if VLAN header is present it is removed from the packet add if missing - if VLAN header is not present it is added to the packet

VLANs Tab

VLAN tables specifies certain forwarding rules for packets that have specific 802.1q tag. Basically the table contains entries that map specific vlan tag ids to a group of one or more ports. Packets with vlan tags leave switch through one or more ports that are set in corresponding table entry

File:Swos vlans.png

Property	Description
VLAN ID	VLAN ID of the packet
Ports	Ports the packet should be forwarded to

Hosts Tab

This table represents dynamically learnt MAC address to port mapping entries. When Switch receives a packet from certain port, it adds the packets source MAC address X and port it received the packet from to host table, so when a packet comes in with destination MAC address X it knows to which port it should forward the packet. If the destination MAC address is not present in host table then it forwards the packet to all ports in the group. Dynamic entries take about 5 minutes to time out.

File:Swos hosts.png

Property	Description
MAC	MAC address (Read-only)
Ports	Ports the packet should be forwarded to (Read-only)

Static Hosts Tab

Static host table entries. Static entries will take over dynamic if dynamic entry with same mac-address already exists. Also by adding a static entry you get access to some more functionality.

File:Swos static hosts.png

Property	Description
MAC	MAC address
Ports	Ports the packet should be forwarded to
Drop	Packet can be cloned and sent to mirror-target port
Mirror	Packet with certain MAC address coming from certain ports can be dropped

ACL Tab

An access control list (ACL) rule table is very powerful tool allowing wire speed packet filtering, forwarding and vlan tagging based on L2,L3,L4 protocol header field matchers.

Each rule contains a matching part and an action part.

Matching part parameters

Property	Description
From	Match port that packet came in from
MAC Src	Match by source MAC address and mask
MAC Dst	Match by destination MAC address and mask
Ethertype	Match by protocol encapsulated in the payload of an Ethernet Frame
VLAN	Match by VLAN header presence: any present not present
VLAN ID	Match by VLAN tag ID
Priority	Match by priority in VLAN tag
IP Src	Match by source IP address and mask
IP Dst	Match by destination IP address and mask
Protocol	Match by IP protocol
DSCP	Match by IP DSCP field

Action part parameters

Property	Description
Redirect To	Whether to force new destination ports (If Redirect To is enabled and no ports specified in Redirect To Ports, packet will be dropped )
Redirect To Ports	Destination ports for
Mirror	Clones matching packets and send them to mirror-target port
Set VLAN ID	If specified changes the vlan tag id, or add new vlan tag if one was not present
Priority	If specified changes the vlan tag priority bits

SNMP Tab

Property	Description
Enabled	Enable or disable SNMP service
Community	SNMP community name
Contact Info	Contact information for the NMS
Location	Location information for the NMS