Manual:CRS3xx series switches

Applies to RouterOS: v6.41 +

Summary

The Cloud Router Switch series are highly integrated switches with high performance ARM CPU and feature-rich packet processor. The CRS switches can be designed into various Ethernet applications including unmanaged switch, Layer 2 managed switch, carrier switch and wired unified packet processing.

Warning: This article applies to CRS3xx series switches and not to CRS1xx/CRS2xx series switches.

Features	Description
Forwarding	Configurable ports for switching or routing Full non-blocking wirespeed switching Up to 16k MAC entries in Unicast FDB for Layer 2 unicast forwarding Up to 1k MAC entries in Multicast FDB for multicast forwarding Up to 256 MAC entries in Reserved FDB for control and management purposes All Forwarding Databases support IVL and SVL Configurable Port based MAC learning limit Jumbo frame support (CRS1xx: 4064 Bytes; CRS2xx: 9204 Bytes)
Mirroring	Various types of mirroring: Port based mirroring VLAN based mirroring MAC based mirroring 2 independent mirroring analyzer ports
VLAN	Fully compatible with IEEE802.1Q and IEEE802.1ad VLAN 4k active VLANs Flexible VLAN assignment: Port based VLAN Protocol based VLAN MAC based VLAN From any to any VLAN translation and swapping 1:1 VLAN switching - VLAN to port mapping VLAN filtering
Port Isolation and Leakage	Applicable for Private VLAN implementation 3 port profile types: Promiscuous, Isolated and Community Up to 28 Community profiles Leakage profiles allow bypassing egress VLAN filtering
Trunking	Supports static link aggregation groups Up to 8 Port Trunk groups Up to 8 member ports per Port Trunk group Hardware automatic failover and load balancing
Quality of Service (QoS)	Flexible QoS classification and assignment: Port based MAC based VLAN based Protocol based PCP/DEI based DSCP based ACL based QoS remarking and remapping for QoS domain translation between service provider and client networks Overriding of each QoS assignment according to the configured priority
Shaping and Scheduling	8 queues on each physical port Shaping per port, per queue, per queue group
Access Control List	Ingress and Egress ACL tables Up to 128 ACL rules (limited by RouterOS) Classification based on ports, L2, L3, L4 protocol header fields ACL actions include filtering, forwarding and modifying of the protocol header fields

This table clarifies main differences between Cloud Router Switch models.

Model	Switch Chip	CPU	Wireless	SFP+ port	Access Control List	Jumbo Frame (Bytes)
CRS326-24G-2S+	Marvell-98DX3236	400MHz	-	+	+	10218
CRS317-1G-16S+	Marvell-98DX8216	800MHz	-	+	+	10218

See also

• CRS examples
• CRS features
• Switch Chip Features
• MTU on RouterBOARD

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