Dvs. inget riktigt Cisco-switch IOS. GNS3 kan för tillfället inte emulera Cisco-switchar pga. den ASIC-typen som används. Man kan dock köra en router ur 3600/3700 serien med "no ip route" och NM-16ESW-modulen som innebär 16st FastEthernet-portar. Du kan då köra VLAN/802.1q, som dock inte riktigt konfigureras/hanteras exakt som dagens Cisco-switchar (använder vlan database) och följande funktioner fungerar:
Layer 2 Ethernet interfaces
Switch Virtual Interfaces (SVI)
VLAN Trunk Protocol (VTP): domains, all modes (server, client and transparent), pruning and passwords.
Trunking: 802.1Q only, no ISL, no dynamic auto or dynamic desirable mode.
EtherChannel: no LACP and Pagp support. Manual configuration supported.
Spanning Tree Protocol: simple STP supported but no MSTP, RSTP or other advanced stuff.
Cisco Discovery Protocol
Switched Port Analyzer (SPAN)
Quality of Service: mls qos commands and mls qos maps are supported.
IP Multicast Support
Storm Control
Flow Control
.. och detta stöds inte:
Access Switch Device Manager (SDM) Template
ACL – Improved Merging Algorithm
ARP Optimization
BGP Increased Support of Numbered as-path Access Lists to 500
BGP Restart Neighbor Session After max-prefix Limit Reached
BGP Route-Map Continue Support for Outbound Policy
Clear Counters Per Port
DHCP Snooping
DHCP Snooping Counters
Diagnotics Options on bootup
ErrDisable Reactivation Per Port
ErrDisable timeout
EtherChannel – Flexible PAgP
Etherchannel Guard
Fallback Bridging
Flex Link Bi-directional Fast Convergence
Flex Link VLAN Load-Balancing
Flex Links Interface Preemption
GOLD – Generic Online Diagnostics
IEEE 802.1ab, Link Layer Discovery Protocol
IEEE 802.1s – Multiple Spanning Tree (MST) Standard Compliance
IEEE 802.1s VLAN Multiple Spanning Trees
IEEE 802.1t
IEEE 802.1W Spanning Tree Rapid Reconfiguration
IEEE 802.1x – Auth Fail Open
IEEE 802.1x – Auth Fail VLAN
IEEE 802.1x – VLAN Assignment
IEEE 802.1x – Wake on LAN Support
IEEE 802.1X Multi-Domain Authentication
IEEE 802.1x RADIUS Accounting
IEEE 802.1x with Port Security
IEEE 802.3ad Link Aggregation (LACP)
IEEE 802.3af Power over Ethernet
IGMP Fast Leave
IGMP Version 1
IGRP
IP Phone Detection Enhancements
IP Phone Enhancement – PHY Loop Detection
IPSG (IP Source Guard)
Jumbo Frames
L2PT – Layer 2 Protocol Tunneling
MAC Authentication Bypass
MLD Snooping
Multicast Etherchannel Load Balancing
NAC – L2 IEEE 802.1x
NAC – L2 IP
NAC – L2 IP with Auth Fail Open
Packet-Based Storm Control
Per Port Per VLAN Policing
Port Security
Port Security on Private VLAN Ports
Private VLANs
QoS Policy Propagation via Border Gateway Protocol (QPPB)
Rapid-Per-VLAN-Spanning Tree (Rapid-PVST)
Reduced MAC Address Usage
Remote SPAN (RSPAN)
Smart Port
Spanning Tree Protocol (STP) – Loop Guard
Spanning Tree Protocol (STP) – PortFast BPDU Filtering
Spanning Tree Protocol (STP) – Portfast Support for Trunks
Spanning Tree Protocol (STP) – Root Guard
Spanning Tree Protocol (STP) – Uplink Load Balancing
SRR (Shaped Round Robin)
Standby Supervisor Port Usage
STP Syslog Messages
Switching Database Manager (SDM)
Trunk Failover
Trusted boundary (extended trust for CDP devices)
Unicast Mac Filtering
UniDirectional Link Detection (UDLD)
VLAN Access Control List (VACL)
VLAN Aware Port Security
Weighted Tail Drop (WTD)
Dold text
Som synes så kommer man ändå en bra bit på vägen Faktiskt hela vägen skulle jag vilja påstå när det gäller CCNA, så länge man kan köra en router-on-a-stick så räcker det ungefär.
