Performance |
Switching capacity and forwarding rate All switches are wire-speed and nonblocking |
Model |
Capacity in millions of packets per second (mpps) (64-byte packets) |
Switching capacity in gigabits per second (Gbps) |
SF250-24 |
9.52 |
12.8 |
SF250-24P |
9.52 |
12.8 |
SF250-48 |
13.10 |
17.6 |
SF250-48HP |
13.10 |
17.6 |
SG250-08 |
11.90 |
16.0 |
SG250-08HP |
11.90 |
16.0 |
SG250-10P |
14.88 |
20.0 |
SG250-18 |
26.78 |
36.0 |
SG250-26 |
38.69 |
52.0 |
SG250-26HP |
38.69 |
52.0 |
SG250-26P |
38.69 |
52.0 |
SG250-50 |
74.41 |
100.0 |
SG250-50HP |
74.41 |
100.0 |
SG250-50P |
74.41 |
100.0 |
SG250X-24 |
95.23 |
128.0 |
SG250X-24P |
95.23 |
128.0 |
SG250X-48 |
130.94 |
176.0 |
SG250X-48P |
130.94 |
176.0 |
Layer 2 switching |
Spanning Tree Protocol (STP) |
Standard 802.1d spanning tree support Fast convergence using 802.1w (Rapid Spanning Tree Protocol [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)
● Up to 4 groups
● Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad LAG
|
VLAN |
Support for up to 255 active VLANs simultaneously Port-based and 802.1Q tag-based VLANs Management VLAN Guest VLAN |
Voice VLAN |
Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS. Auto voice capabilities deliver networkwide zero-touch deployment of voice endpoints and call control devices |
Generic VLAN Registration Protocol (GVRP) and Generic Attribute Registration Protocol (GARP) |
Protocols for automatically propagating and configuring VLANs in a bridged domain |
IGMP (versions 1, 2, and 3) snooping |
Internet Group Management Protocol (IGMP) limits bandwidth-intensive multicast traffic to only the requesters; supports 255 multicast groups (source-specific multicasting is also supported) |
IGMP querier |
Used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router |
HOL blocking |
Head-Of-Line (HOL) blocking |
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 routing |
IPv4 routing |
Wire-speed routing of IPv4 packets Up to 32 static routes and up to 16 IP interfaces |
IPv6 routing |
Wire-speed routing of IPv6 packets |
Layer 3 interface |
Configuration of Layer 3 interface on physical port, LAG, VLAN interface, or loopback interface |
Classless Interdomain Routing (CIDR) |
Support for CIDR |
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 bootP/DHCP packets |
Security |
SSL |
Secure Sockets Layer (SSL) encrypts all HTTPS traffic, allowing secure access to the browser-based management GUI in the switch |
Secure Shell (SSH) Protocol |
SSH is a secure replacement for Telnet traffic. Secure Copy (SCP) also uses SSH. SSH v1 and v2 are supported |
IEEE 802.1X (authenticator role) |
RADIUS authentication, guest VLAN, single/multiple host mode, and single/multiple sessions |
Secure Core Technology (SCT) |
Ensures 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]) |
Port security |
Ability to lock source MAC addresses to ports and limit the number of learned MAC addresses |
RADIUS |
Supports RADIUS authentication for management access. Switch functions as a client |
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 |
Access Control Lists (ACLs) |
Support for up to 512 rules Drop or rate limit based on source and destination MAC, VLAN ID or IP address, protocol, port, differentiated services code point (DSCP)/IP precedence, 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 |
STP loopback guard |
Provides additional protection against Layer 2 forwarding loops (STP loops) |
Quality of service |
Priority levels |
8 hardware queues |
Scheduling |
Strict priority and Weighted Round-Robin (WRR) queue assignment based on DSCP and class of service (802.1p/CoS) |
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 re-marking ACLs, trusted QoS |
Rate limiting |
Ingress policer; egress shaping and rate control; per VLAN, per port, and flow based |
Congestion avoidance |
A TCP congestion avoidance algorithm is required to reduce and prevent global TCP loss synchronization |
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 802.3x Flow Control, IEEE 802.3 ad LACP, IEEE 802.1D (STP), IEEE 802.1Q/p VLAN, IEEE 802.1w RSTP, IEEE 802.1s Multiple STP, IEEE 802.1X Port Access Authentication, IEEE 802.3af, IEEE 802.3at, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 879, RFC 896, RFC 826, 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 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 3416, RFC 4330 |
IPv6 |
IPv6 |
IPv6 host mode IPv6 over Ethernet Dual IPv6/IPv4 stack IPv6 neighbor and Router Discovery (ND) IPv6 stateless address auto configuration Read more
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