Manual:CRS1xx/2xx series switches examples

Applies to RouterOS: v6.12 +

Summary

Basic switch-chip configuration examples for Cloud Router Switch.

VLAN

Note: It is recommended to get Serial Console cable and test it before configuring VLANs because you may lose access to the CPU and/or the port you are connected to.

Note: Some changes may take some time to take effect due to already learned MAC addreses. In such cases flushing Unicast Forwarding Database can help: /interface ethernet switch unicast-fdb flush

Note: Multiple master-port configuration is designed as fast and simple port isolation solution, but it limits part of VLAN functionality supported by CRS switch-chip. For advanced configurations use one master-port within CRS switch chip for all ports, configure VLANs and isolate port groups with port isolation profile configuration.

Port Based VLAN

Example 1

Port Based VLAN 1

• Choose a master port and enslave the ports you need to be in the same switch group.

/interface ethernet
set ether6 master-port=ether2
set ether7 master-port=ether2
set ether8 master-port=ether2

• Add initial VLAN assignments (PVID) to VLAN access ports.

/interface ethernet switch ingress-vlan-translation
add ports=ether6 customer-vid=0 new-customer-vid=200 sa-learning=yes
add ports=ether7 customer-vid=0 new-customer-vid=300 sa-learning=yes
add ports=ether8 customer-vid=0 new-customer-vid=400 sa-learning=yes

• Add VLAN 200, VLAN 300 and VLAN 400 tagging on ether2 port to create it as VLAN trunk port.

/interface ethernet switch egress-vlan-tag
add tagged-ports=ether2 vlan-id=200
add tagged-ports=ether2 vlan-id=300
add tagged-ports=ether2 vlan-id=400

• VLAN membership definitions in the VLAN table are required for proper isolation. Adding entries with VLAN id and ports makes that VLAN traffic valid on those ports.

/interface ethernet switch vlan
add ports=ether2,ether6 vlan-id=200 learn=yes
add ports=ether2,ether7 vlan-id=300 learn=yes
add ports=ether2,ether8 vlan-id=400 learn=yes

• After valid VLAN configuration unknown/invalid VLAN forwarding can be disabled in global switch settings.

/interface ethernet switch
set drop-if-invalid-or-src-port-not-member-of-vlan-on-ports=ether2,ether6,ether7,ether8

Example 2

Port Based VLAN 2

• Create a group of switched ports.

/interface ethernet
set ether6 master-port=ether2
set ether7 master-port=ether2
set ether8 master-port=ether2

• Add initial VLAN assignments (PVID) for untagged traffic on ether6, ether7, ether8 ports.

/interface ethernet switch ingress-vlan-translation
add ports=ether6 customer-vid=0 new-customer-vid=200 sa-learning=yes
add ports=ether7 customer-vid=0 new-customer-vid=300 sa-learning=yes
add ports=ether8 customer-vid=0 new-customer-vid=400 sa-learning=yes

• Add VLAN 200, VLAN 300 and VLAN 400 tagging on ports according to diagram. The tagged-ports option allow multiple values to support tagging on many ports.

/interface ethernet switch egress-vlan-tag
add tagged-ports=ether2,ether7,ether8 vlan-id=200
add tagged-ports=ether2,ether6,ether8 vlan-id=300
add tagged-ports=ether2,ether6,ether7 vlan-id=400

• VLAN membership definitions in the VLAN table are required for proper isolation. Adding entries with VLAN id and ports makes that VLAN traffic valid on those ports.

/interface ethernet switch vlan
add ports=ether2,ether6,ether7,ether8 vlan-id=200 learn=yes
add ports=ether2,ether6,ether7,ether8 vlan-id=300 learn=yes
add ports=ether2,ether6,ether7,ether8 vlan-id=400 learn=yes

• Unknown VLANs should be disabled after valid VLAN membership configuration.

/interface ethernet switch
set drop-if-invalid-or-src-port-not-member-of-vlan-on-ports=ether2,ether6,ether7,ether8

Protocol Based VLAN

Protocol Based VLAN

• Create a group of switched ports.

/interface ethernet
set ether6 master-port=ether2
set ether7 master-port=ether2
set ether8 master-port=ether2

• Set VLAN for IP and ARP protocols

/interface ethernet switch protocol-based-vlan
add port=ether2 protocol=arp set-customer-vid-for=all new-customer-vid=0
add port=ether6 protocol=arp set-customer-vid-for=all new-customer-vid=200
add port=ether2 protocol=ip set-customer-vid-for=all new-customer-vid=0
add port=ether6 protocol=ip set-customer-vid-for=all new-customer-vid=200

• Set VLAN for IPX protocol

/interface ethernet switch protocol-based-vlan
add port=ether2 protocol=ipx set-customer-vid-for=all new-customer-vid=0
add port=ether7 protocol=ipx set-customer-vid-for=all new-customer-vid=300

• Set VLAN for AppleTalk AARP and AppleTalk DDP protocols

/interface ethernet switch protocol-based-vlan
add port=ether2 protocol=0x80F3 set-customer-vid-for=all new-customer-vid=0
add port=ether8 protocol=0x80F3 set-customer-vid-for=all new-customer-vid=400
add port=ether2 protocol=0x809B set-customer-vid-for=all new-customer-vid=0
add port=ether8 protocol=0x809B set-customer-vid-for=all new-customer-vid=400

MAC Based VLAN

MAC Based VLAN

• Create a group of switched ports.

/interface ethernet
set ether7 master-port=ether2

• Enable MAC based VLAN translation on access port.

/interface ethernet switch port
set ether7 allow-fdb-based-vlan-translate=yes \
allow-mac-based-customer-vlan-assignment-for=tagged-frame-only

• Add MAC-to-VLAN mapping entries in MAC based VLAN table.

/interface ethernet switch mac-based-vlan
add src-mac=A4:12:6D:77:94:43 new-customer-vid=200
add src-mac=84:37:62:DF:04:20 new-customer-vid=300
add src-mac=E7:16:34:A1:CD:18 new-customer-vid=400

• Set VLAN id untagging for tagged frames coming from the trunk port.

/interface ethernet switch ingress-vlan-translation
add ports=ether2 customer-vlan-format=tagged new-customer-vid=0 sa-learning=yes

Management IP Configuration

• Management IP address has to be assigned to master-port.

/ip address
add address=192.168.88.1/24 interface=ether2 network=192.168.88.0

• Or add VLAN 99 interface and assign IP address to it. Since the master-port receives all the traffic coming from switch-cpu port, VLAN has to be configured on master-port, in this case "ether2" port.

/interface vlan
add name=vlan99 vlan-id=99 interface=ether2
/ip address
add address=192.168.88.1/24 interface=vlan99 network=192.168.88.0

InterVLAN Routing

InterVLAN Routing

InterVLAN routing configuration consists of two main parts – VLAN tagging in switch-chip and routing in RouterOS. This configuration can be used in many applications by combining it with DHCP server, Hotspot, PPP and other features for each VLAN. Additionally this example covers blocking of unwanted other VLAN traffic on ports.

• Create a group of switched ports.

/interface ethernet
set ether6 master-port=ether2
set ether7 master-port=ether2
set ether8 master-port=ether2

• Set VLAN tagging on CPU port for all VLANs to make packets tagged before they are routed and add ingress VLAN translation rules to ensure correct VLAN id assignment is done on access ports.

/interface ethernet switch egress-vlan-tag
add tagged-ports=switch1-cpu vlan-id=200
add tagged-ports=switch1-cpu vlan-id=300
add tagged-ports=switch1-cpu vlan-id=400

/interface ethernet switch ingress-vlan-translation
add ports=ether6 customer-vid=0 new-customer-vid=200 sa-learning=yes
add ports=ether7 customer-vid=0 new-customer-vid=300 sa-learning=yes
add ports=ether8 customer-vid=0 new-customer-vid=400 sa-learning=yes

• For routing add VLAN interfaces on master-port because it connects with CPU port and add IP addresses to created VLAN interfaces. In this example three 192.168.x.1 addresses are added to vlan200, vlan300 and vlan400 interfaces.

/interface vlan
add name=vlan200 interface=ether2 vlan-id=200
add name=vlan300 interface=ether2 vlan-id=300
add name=vlan400 interface=ether2 vlan-id=400

/ip address
add address=192.168.20.1/24 interface=vlan200 network=192.168.20.0
add address=192.168.30.1/24 interface=vlan300 network=192.168.30.0
add address=192.168.40.1/24 interface=vlan400 network=192.168.40.0

Unknown/Invalid VLAN filtering

VLAN membership is defined in the VLAN table. Adding entries with VLAN id and ports makes that VLAN traffic valid on those ports. After valid VLAN configuration unknown/invalid VLAN forwarding can be disabled in global switch settings. This VLAN filtering configuration example applies to InterVLAN Routing setup.

/interface ethernet switch vlan
add ports=switch1-cpu,ether6 vlan-id=200 learn=yes
add ports=switch1-cpu,ether7 vlan-id=300 learn=yes
add ports=switch1-cpu,ether8 vlan-id=400 learn=yes

/interface ethernet switch
set forward-unknown-vlan=no

Mirroring

Mirroring

The Cloud Router Switches support three types of mirroring. Port based mirroring can be applied to any of switch-chip ports, VLAN based mirroring works for all specified VLANs regardless switch-chip ports and MAC based mirroring copies traffic sent or received from specific device reachable from the port configured in Unicast Forwarding Database.

Port Based Mirroring

The first configuration sets ether5 port as a mirror0 analyzer port for both ingress and egress mirroring, mirrored traffic will be sent to this port. Port based ingress and egress mirroring is enabled from ether7 port.

/interface ethernet switch
set ingress-mirror0=ether8 egress-mirror0=ether8

/interface ethernet switch port
set ether7 egress-mirror-to=mirror0 ingress-mirror-to=mirror0

VLAN Based Mirroring

The second example requires ports to be switched in a group. Mirroring configuration sets ether5 port as a mirror0 analyzer port and sets mirror0 port to be used when mirroring from VLAN occurs. VLAN table entry enables mirroring only for VLAN 300 traffic between ether2 and ether7 ports.

/interface ethernet
set ether7 master-port=ether2

/interface ethernet switch
set ingress-mirror0=ether5 vlan-uses=mirror0

/interface ethernet switch vlan
add ports=ether2,ether7 vlan-id=300 learn=yes ingress-mirror=yes

MAC Based Mirroring

The third configuration also requires ports to be switched in a group. Mirroring configuration sets ether5 port as a mirror0 analyzer port and sets mirror0 port to be used when mirroring from Unicast Forwarding database occurs. The entry from Unicast Forwarding database enables mirroring for packets with source or destination MAC address E7:16:34:A1:CD:18 from ether8 port.

/interface ethernet
set ether8 master-port=ether2

/interface ethernet switch
set ingress-mirror0=ether5 fdb-uses=mirror0

/interface ethernet switch unicast-fdb
add port=ether8 mirror=yes svl=yes mac-address=E7:16:34:A1:CD:18

Trunking

Trunking

The Trunking in the Cloud Router Switches provides static link aggregation groups with hardware automatic failover and load balancing. IEEE802.3ad and IEEE802.1ax compatible Link Aggregation Control Protocol is not supported yet. Up to 8 Trunk groups are supported with up to 8 Trunk member ports per Trunk group.

• Configuration requires a group of switched ports and an entry in the Trunk table.

/interface ethernet
set ether6 master-port=ether2
set ether7 master-port=ether2
set ether8 master-port=ether2

/interface ethernet switch trunk
add name=trunk1 member-ports=ether6,ether7,ether8

• This example also shows proper bonding configuration in RouterOS on the other end.

/interface bonding
add name=bonding1 slaves=ether2,ether3,ether4 mode=balance-xor transmit-hash-policy=layer-2-and-3 \
link-monitoring=mii mii-interval=100ms

Port-level Isolation

Port-level Isolation

Port-level isolation is often used for Private VLAN, where:

• One or multiple uplink ports are shared among all users for accessing gateway or router.
• Port group Isolated Ports is for guest users. Communication is through the uplink ports only.
• Port group Community 0 is for department A. Communication is allowed between the group members and through uplink ports.
• Port group Community X is for department X. Communication is allowed between the group members and through uplink ports.

The Cloud Router Switches use port-level isolation profiles for Private VLAN implementation:

• Uplink ports – Port-level isolation profile 0
• Isolated ports – Port-level isolation profile 1
• Community 0 ports - Port-level isolation profile 2
• Community X (X <= 30) ports - Port-level isolation profile X

This example requires a group of switched ports. Assume that all ports used in this example are in one switch group configured with master-port setting.

The first part of port isolation configuration is setting the Uplink port – set port profile to 0 for ether2.

/interface ethernet switch port
set ether2 isolation-leakage-profile-override=0

Then continue with setting isolation profile 1 to all isolated ports and adding the communication port for port isolation profile 1.

/interface ethernet switch port
set ether5 isolation-leakage-profile-override=1
set ether6 isolation-leakage-profile-override=1

/interface ethernet switch port-isolation
add port-profile=1 ports=ether2 type=dst

Configuration to set Community 0 and Community 1 ports is similar.

/interface ethernet switch port
set ether7 isolation-leakage-profile-override=2
set ether8 isolation-leakage-profile-override=2

/interface ethernet switch port-isolation
add port-profile=2 ports=ether2,ether7,ether8 type=dst

/interface ethernet switch port
set ether9 isolation-leakage-profile-override=3
set ether10 isolation-leakage-profile-override=3

/interface ethernet switch port-isolation
add port-profile=3 ports=ether2,ether9,ether10 type=dst

Bandwidth Limiting

Both Ingress Port policer and Shaper provide bandwidth limiting features for CRS switches.

• Ingress Port Policer sets RX limit on port:

/interface ethernet switch ingress-port-policer
add port=ether5 meter-unit=bit rate=10M

• Shaper sets TX limit on port:

/interface ethernet switch shaper
add port=ether5 meter-unit=bit rate=10M

Traffic Storm Control

The same Ingress Port policer also can be used for the traffic storm control to prevent disruptions on Layer 2 ports by a broadcast, multicast, or unicast traffic storm.

• Broadcast storm control example on ether5 port with 8 kilobit limit per second:

/interface ethernet switch ingress-port-policer
add port=ether5 rate=8k meter-unit=packet packet-types=broadcast 

• Example with multiple packet types which includes ARP and ND protocols and unregistered multicast traffic. Unregistered multicast is traffic which is not defined in Multicast Forwarding database.

/interface ethernet switch ingress-port-policer
add port=ether5 rate=2M meter-unit=packet packet-types=broadcast,arp-or-nd,unregistered-multicast

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