Performance

Switching capacity and forwarding rate

All switches are wire speed and nonblocking

Model Name

Capacity in Millions of Packets per Second (mpps) (64-byte packets)

Switching Capacity in Gigabits per Second (Gbps)

CBS350-8T-E-2G

14.88

20.0

CBS350-8P-2G

14.88

20.0

CBS350-8P-E-2G

14.88

20.0

CBS350-8FP-2G

14.88

20.0

CBS350-8FP-E-2G

14.88

20.0

CBS350-8S-E-2G

14.88

20.0

CBS350-16T-2G

26.78

36.0

CBS350-16T-E-2G

26.78

36.0

CBS350-16P-2G

26.78

36.0

CBS350-16P-E-2G

26.78

36.0

CBS350-16FP-2G

26.78

36.0

CBS350-24T-4G

41.66

56.0

CBS350-24P-4G

41.66

56.0

CBS350-24FP-4G

41.66

56.0

CBS350-24S-4G

41.66

56.0

CBS350-48T-4G

77.38

104.0

CBS350-48P-4G

77.38

104.0

CBS350-48FP-4G

77.38

104.0

CBS350-24T-4X

95.23

128.0

CBS350-24P-4X

95.23

128.0

CBS350-24FP-4X

95.23

128.0

CBS350-48T-4X

130.94

176.0

CBS350-48P-4X

130.94

176.0

CBS350-48FP-4X

130.94

176.0

CBS350-8MGP-2X

46.13

62.0

CBS350-8MP-2X

29.76

80.0

CBS350-24MGP-4X

104.16

140.0

CBS350-12NP-4X

148.80

200.0

CBS350-24NGP-4X

142.85

192.0

CBS350-48NGP-4X

178.56

240.0

CBS350-8XT

119.05

160.0

CBS350-12XS

178.56

240.0

CBS350-12XT

178.56

240.0

CBS350-16XTS

238.08

320.0

CBS350-24XS

240.00

480.0

CBS350-24XT

240.00

480.0

CBS350-24XTS

240.00

480.0

CBS350-48XT-4X

755.81

1,040.0

Layer 2 Switching

Spanning Tree Protocol

Standard 802.1d Spanning Tree support

Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by default

Multiple Spanning Tree instances using 802.1s (MSTP); 8 instances are supported

Per-VLAN Spanning Tree Plus (PVST+) and Rapid PVST+ (RPVST+); 126 instances are supported

Port grouping/link aggregation

Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP)

VLAN

Support for up to 4,094 VLANs simultaneously

Port-based and 802.1Q tag-based VLANs; MAC-based VLAN; protocol-based VLAN; IP subnet-based VLAN

Management VLAN

Private VLAN with promiscuous, isolated, and community port

Private VLAN Edge (PVE), also known as protected ports, with multiple uplinks

Guest VLAN, unauthenticated VLAN

Dynamic VLAN assignment via RADIUS server along with 802.1x client authentication

CPE VLAN

Voice VLAN

Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS. Voice Services Discovery Protocol (VSDP) delivers network wide zero-touch deployment of voice endpoints and call control devices

Multicast TV VLAN

Multicast TV VLAN allows the single multicast VLAN to be shared in the network while subscribers remain in separate VLANs. This feature is also known as Multicast VLAN Registration (MVR)

VLAN Translation

Support for VLAN One-to-One Mapping. In VLAN One-to-One Mapping, on an edge interface customer VLANs (C-VLANs) are mapped to service provider VLANs (S-VLANs) and the original C-VLAN tags are replaced by the specified S-VLAN

Q-in-Q

VLANs transparently cross a service provider network while isolating traffic among customers

Selective Q-in-Q

Selective Q-in-Q is an enhancement to the basic Q-in-Q feature and provides, per edge interface, multiple mappings of different C-VLANs to separate S-VLANs

Selective Q-in-Q also allows configuring of Ethertype (Tag Protocol Identifier [TPID]) of the S-VLAN tag

Layer 2 protocol tunneling over Q-in-Q is also supported

Generic VLAN Registration Protocol (GVRP)/Generic Attribute Registration Protocol (GARP)

Generic VLAN Registration Protocol (GVRP) and Generic Attribute Registration Protocol (GARP) enable automatic propagation and configuration of VLANs in a bridged domain

Unidirectional Link Detection (UDLD)

UDLD monitors physical connection to detect unidirectional links caused by incorrect wiring or cable/port faults to prevent forwarding loops and black holing of traffic in switched networks

Dynamic Host Configuration Protocol (DHCP) Relay at Layer 2

Relay of DHCP traffic to DHCP server in different VLAN; works with DHCP Option 82

Internet Group Management Protocol (IGMP) versions 1, 2, and 3 snooping

IGMP limits bandwidth-intensive multicast traffic to only the requesters; supports 2K multicast groups (source-specific multicasting is also supported)

IGMP Querier

IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router

IGMP proxy

The IGMP proxy provides a mechanism for multicast forwarding based on IGMP membership information without the need for more complicated multicast routing protocols.

Head-of-Line (HOL) blocking

HOL blocking prevention

Loopback Detection

Loopback detection provides protection against loops by transmitting loop protocol packets out of ports on which loop protection has been enabled. It operates independently of STP

Layer 3

IPv4 routing

Wirespeed routing of IPv4 packets

Up to 990 static routes and up to 128 IP interfaces

IPv6 routing

Wirespeed routing of IPv6 packets

Layer 3 Interface

Configuration of Layer 3 interface on physical port, Link Aggregation (LAG), VLAN interface, or loopback interface

Classless Interdomain Routing (CIDR)

Support for classless interdomain routing

RIP v2

Support for Routing Information Protocol version 2 for dynamic routing

Policy-Based Routing (PBR)

Flexible routing control to direct packets to different next hop based on IPv4 or IPv6 Access Control List (ACL)

DHCP Server

Switch functions as an IPv4 DHCP server serving IP addresses for multiple DHCP pools/scopes

Support for DHCP options

DHCP relay at Layer 3

Relay of DHCP traffic across IP domains

User Datagram Protocol (UDP) relay

Relay of broadcast information across Layer 3 domains for application discovery or relaying of Bootstrap Protocol (BOOTP)/DHCP packets

Stacking

Hardware stacking

Up to 4 units in a stack. Up to 200 ports managed as a single system with hardware failover

Stacking is supported on the following models

CBS350-24T-4X, CBS350-24P-4X, CBS350-24FP-4X, CBS350-48T-4X, CBS350-48P-4X, CBS350-48FP-4X

CBS350-8MP-2X, CBS350-24MGP-4X, CBS350-12NP-4X, CBS350-24NGP-4X, CBS350-48NGP-4X

CBS350-8XT, CBS350-12XS, CBS350-12XT, CBS350-16XTS, CBS350-24XS, CBS350-24XT, CBS350-24XTS, CBS350-48XT-4X

High availability

Fast stack failover delivers minimal traffic loss. Support link aggregation across multiple units in a stack

Plug-and-play stacking configuration/management

Active/standby for resilient stack control

Autonumbering

Hot swap of units in stack

Ring and chain stacking options, auto stacking port speed, flexible stacking port options

High-speed stack interconnects

Cost-effective high-speed 10G fiber interfaces.

Security

Secure Shell (SSH) Protocol

SSH is a secure replacement for Telnet traffic. Secure Copy Protocol (SCP) also uses SSH. SSH v1 and v2 are supported

Secure Sockets Layer (SSL)

SSL support: Encrypts all HTTPS traffic, allowing highly secure access to the browser-based management GUI in the switch

IEEE 802.1X (Authenticator role)

802.1X: Remote Authentication Dial-In User Service (RADIUS) authentication and accounting, MD5 hash; guest VLAN; unauthenticated VLAN, single/multiple host mode and single/multiple sessions

Supports time-based 802.1X; dynamic VLAN assignment; MAC authentication

IEEE 802.1X supplicant

A switch can be configured to act as a supplicant to another switch. This enables extended secure access in areas outside the wiring closet (such as conference rooms)

Web-based authentication

Web-based authentication provides network admission control through web browser to any host devices and operating systems

STP Bridge Protocol Data Unit (BPDU) Guard

A security mechanism to protect the network from invalid configurations. A port enabled for BPDU Guard is shut down if a BPDU message is received on that port. This avoids accidental topology loops

STP Root Guard

This prevents edge devices not in the network administrator’s control from becoming Spanning Tree Protocol root nodes

STP loopback guard

Provides additional protection against Layer 2 forwarding loops (STP loops)

DHCP snooping

Filters out DHCP messages with unregistered IP addresses and/or from unexpected or untrusted interfaces. This prevents rogue devices from behaving as DHCP Servers.

IP Source Guard (IPSG)

When IP Source Guard is enabled at a port, the switch filters out IP packets received from the port if the source IP addresses of the packets have not been statically configured or dynamically learned from DHCP snooping. This prevents IP address spoofing.

Dynamic ARP Inspection (DAI)

The switch discards ARP packets from a port if there are no static or dynamic IP/MAC bindings or if there is a discrepancy between the source or destination addresses in the ARP packet. This prevents man-in-the-middle attacks.

IP/MAC/Port Binding (IPMB)

The preceding features (DHCP Snooping, IP Source Guard, and Dynamic ARP Inspection) work together to prevent DOS attacks in the network, thereby increasing network availability

Secure Core Technology (SCT)

Makes sure that the switch will receive and process management and protocol traffic no matter how much traffic is received

Secure Sensitive Data (SSD)

A mechanism to manage sensitive data (such as passwords, keys, and so on) securely on the switch, populating this data to other devices, and secure autoconfig. Access to view the sensitive data as plaintext or encrypted is provided according to the user-configured access level and the access method of the user.

Trustworthy systems

Trustworthy systems provide a highly secure foundation for Cisco products

Run-time defenses (Executable Space Protection [X-Space], Address Space Layout Randomization [ASLR], Built-In Object Size Checking [BOSC])

Private VLAN

Private VLAN provides security and isolation between switch ports, which helps ensure that users cannot snoop on other users’ traffic; supports multiple uplinks

Layer 2 isolation Private VLAN Edge (PVE)

PVE (also known as protected ports) provides Layer 2 isolation between devices in the same VLAN, supports multiple uplinks

Port security

Ability to lock source MAC addresses to ports and limits the number of learned MAC addresses

RADIUS/TACACS+

Supports RADIUS and TACACS authentication. Switch functions as a client

RADIUS accounting

The RADIUS accounting functions allow data to be sent at the start and end of services, indicating the amount of resources (such as time, packets, bytes, and so on) used during the session

Storm control

Broadcast, multicast, and unknown unicast

DoS prevention

Denial-of-Service (DOS) attack prevention

Multiple user privilege levels in CLI

Level 1, 7, and 15 privilege levels

ACLs

Support for up to 1,024 rules

Drop or rate limit based on source and destination MAC, VLAN ID, IPv4 or IPv6 address, IPv6 flow label, protocol, port, Differentiated Services Code Point (DSCP)/IP precedence, Transmission Control Protocol/User Datagram Protocol (TCP/UDP) source and destination ports, 802.1p priority, Ethernet type, Internet Control Message Protocol (ICMP) packets, IGMP packets, TCP flag; ACL can be applied on both ingress and egress sides

Time-based ACLs supported

Quality of Service

Priority levels

8 hardware queues

Scheduling

Strict priority and Weighted Round-Robin (WRR)

Class of service

Port based; 802.1p VLAN priority-based; IPv4/v6 IP precedence/Type of Service (ToS)/DSCP-based; Differentiated Services (DiffServ); classification and remarking ACLs, trusted QoS

Queue assignment based on DSCP and class of service (802.1p/CoS)

Rate limiting

Ingress policer; egress shaping and rate control; per VLAN, per port, and flow based; 2R3C policing

Congestion avoidance

A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization

iSCSI traffic optimization

A mechanism for giving priority to iSCSI traffic over other types of traffic

Standards

Standards

IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet, IEEE 802.3ab 1000BASE-T Gigabit Ethernet, IEEE 802.3ad Link Aggregation Control Protocol, IEEE 802.3z Gigabit Ethernet, IEEE 802.3ae 10 Gbit/s Ethernet over fiber for LAN, IEEE 802.3an 10GBase-T 10 Gbit/s Ethernet over copper twisted pair cable, IEEE 802.3x Flow Control, IEEE 802.1D (STP, GARP, and GVRP), IEEE 802.1Q/p VLAN, IEEE 802.1w Rapid STP, IEEE 802.1s Multiple STP, IEEE 802.1X Port Access Authentication, IEEE 802.3af, IEEE 802.3at, IEEE 802.1AB Link Layer Discovery Protocol, IEEE 802.3az Energy Efficient Ethernet, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 826, RFC 879, RFC 896, RFC 854, RFC 855, RFC 856, RFC 858, RFC 894, RFC 919, RFC 920, RFC 922, RFC 950, RFC 951, RFC 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1213, RFC 1215, RFC 1286, RFC 1350, RFC 1442, RFC 1451, RFC 1493, RFC 1533, RFC 1541, RFC 1542, RFC 1573, RFC 1624, RFC 1643, RFC 1700, RFC 1757, RFC 1867, RFC 1907, RFC 2011, RFC 2012, RFC 2013, RFC 2030, RFC 2131, RFC 2132, RFC 2233, RFC 2576, RFC 2616, RFC 2618, RFC 2665, RFC 2666, RFC 2674, RFC 2737, RFC 2819, RFC 2863, RFC 3164, RFC 3176, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 3416, RFC 4330