Cisco Catalyst 4948 Switch

At-a-Glance

• Cisco Network Assistant At-a-Glance 14-May-2008 (PDF - 371 KB)

Data Sheets

• Cisco Catalyst 4948 10 Gigabit Ethernet Switch Data Sheet 10-Aug-2014
• Cisco Catalyst 4948 Switch Data Sheet 15-Jan-2016
• Cisco Catalyst 4900M Switch Data Sheet 10-Aug-2014

End-of-Life and End-of-Sale Notices

English

• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4948E Switch Accessories 03-Aug-2020
• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4948E Ethernet Switch 01-Feb-2019
• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4900M Switch 29-Mar-2018
• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4948 Switch Accessories 25-Jul-2014
• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4948 Switch 29-Mar-2018
• End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 4948-10GE, Cisco Catalyst 4928-10GE, and Cisco ME 4924-10GE Switches 29-Mar-2018

French - Canadian

• Annonce d’arrêt de commercialisation et de fin de vie de Cisco Catalyst 4948E Switch Accessories 03-Aug-2020
• Annonce d’arrêt de commercialisation et de fin de vie des commutateurs Cisco Catalyst 4900M 03-Nov-2015
• Annonce d’arrêt de commercialisation et de fin de vie des commutateurs Ethernet Cisco Catalyst 4948E 31-Oct-2016

Bulletins

• Cisco IOS Software Release 12.2(31)SG for Cisco Catalyst 4900 Series Switches 29-Jul-2020

Field Notices

Cisco Catalyst 4948 Switch

• Field Notice: FN - 63746 - Catalyst C4500 and Catalyst 49xx Might Fail to Boot Up After a Software Upgrade or Power Cycle - Replace on Failure 10-Sep-2018

Release Notes

15.x(x)SGx

• Release Notes for the Catalyst 4900M Series Switch and the Catalyst 4948E Ethernet Switch, Cisco IOS 15.1(2)SGx 04-Dec-2017
• Release Notes for the Catalyst 4900M Series Switch and the Catalyst 4948E Ethernet Switch, Cisco IOS 15.1(1)SG 30-Jun-2014
• Release Note for Catalyst 4900M and Catalyst 4948E Switch, Release 15.0(2)SG 28-Apr-2011
• Release Note for Catalyst 4900 Series Switch, Release 15.0(2)SG 03-Nov-2016

12.2(xx)SG

• Release Note for Catalyst 4948 Series Switch, Cisco IOS Release 12.2(54)SGx and 12.2(53)SGx 18-Aug-2014
• Release Note for Catalyst 4900M Series Switch and Catalyst 4948E Ethernet Switch, Cisco IOS Release 12.2(54)SGx and 12.2(53)SGx 18-Aug-2014
• Release Note for Catalyst 4900M Series Switch, Cisco IOS, 12.2(53)SG3 27-Aug-2010
• Release Note for the Cisco 4900M Switch, Cisco IOS, 12.2(53)SG2 09-Jun-2010

Command References

• Catalyst 4500 Series Switch Cisco IOS Command Reference, IOS XE 3.8.xE and IOS 15.2.(4)Ex 18-Apr-2016
• Command Reference BookMap123 29-Apr-2010

Design TechNotes

• Connecting a Modem to the Console Port on Catalyst Switches 12-Feb-2019
• Connecting a Terminal to the Console Port on Catalyst Switches 16-Nov-2007
• Inter-Switch Link and IEEE 802.1Q Frame Format 25-Aug-2006
• Network Address Translation Catalyst Switch Support Matrix 05-Apr-2006
• Spanning Tree Protocol Problems and Related Design Considerations 05-Dec-2017
• Spanning Tree Protocol Root Guard Enhancement 30-Aug-2005
• System Requirements to Implement Gigabit Ethernet on Catalyst Switches 20-Dec-2005
• System Requirements to Implement Trunking 10-Aug-2006
• Understanding Catalyst 2900 and Catalyst 4000 Naming Conventions 25-Feb-2019
• Understanding VLAN Trunk Protocol (VTP) 29-Sep-2014
• Understanding and Configuring the Cisco UplinkFast Feature 18-Aug-2008
• Understanding and Configuring the Unidirectional Link Detection Protocol Feature 09-Jul-2007
• Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks 17-Nov-2008
• Using PortFast and Other Commands to Fix Workstation Startup Connectivity Delays 19-Dec-2008

Install and Upgrade Guides

Cisco Catalyst 4948 Switch

• Catalyst 4948 Install Guide 06-May-2007

Install and Upgrade TechNotes

• Configuration example to migrate Spanning Tree from PVST+ to MST 13-Dec-2006
• Configuration example to migrate Spanning Tree from PVST+ to MST 26-Sep-2014

Configuration Examples and TechNotes

Most Recent

• Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation 15-Jul-2020
• Connecting a Modem to the Console Port on Catalyst Switches 12-Feb-2019
• Configuring EtherChannel and 802.1Q Trunking with Catalyst 2948G-L3s and CatOS Based Switches 01-Oct-2014
• Understanding VLAN Trunk Protocol (VTP) 29-Sep-2014
• Configuration example to migrate Spanning Tree from PVST+ to MST 26-Sep-2014
• Spanning Tree from PVST+ to Rapid-PVST Migration Configuration Example 26-Sep-2014
• Configuring VLAN Trunk Protocol (VTP) 24-Sep-2014
• Creating Ethernet VLANs on Catalyst Switches 02-May-2014
• Managing Software Images and Working with Configuration Files on Catalyst Switches 15-Oct-2009
• Using PortFast and Other Commands to Fix Workstation Startup Connectivity Delays 19-Dec-2008
• EtherChannel Between Catalyst 3550/3560/3750 Series Switches and Catalyst Switches Running Cisco IOS System Software Configuration Example 25-Sep-2008
• Understanding and Configuring the Cisco UplinkFast Feature 18-Aug-2008
• Configuring EtherChannel Between a Catalyst Switch Running CatOS and a Workstation or Server 12-Jul-2007
• Understanding and Configuring the Unidirectional Link Detection Protocol Feature 09-Jul-2007
• All Transparent VTP Domain to Server-Client VTP Domain Migration Configuration Example 02-Feb-2007

Configuration Guides

Catalyst 4900 and 4500 switches share configuration information. Refer to the documentation at the locations below:

• Catalyst 4500 Series Switch Software Configuration Guide, IOS XE 3.8.0E and IOS 15.2(4)E 25-Apr-2016

Maintain and Operate TechNotes

• Cisco Small Form-Factor Pluggable (SFP) Transceiver Modules Maintenance and Troubleshooting 29-Aug-2008
• Cisco Small Form-Factor Pluggable (SFP) Transceiver Modules Maintenance and Troubleshooting 23-Sep-2014 (PDF - 345 KB)
• Managing Software Images and Working with Configuration Files on Catalyst Switches 15-Oct-2009

Password Recovery

• Password Recovery Procedure for Catalyst 4500/4000 Supervisor Engine II+/II+TS/II+10GE/III/IV/V/V 10GE Module and Catalyst 4900 Switches that Run Cisco IOS Software 26-Aug-2008

Troubleshooting TechNotes

Most Recent

• Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation 15-Jul-2020
• Understanding and Troubleshooting HSRP Problems in Catalyst Switch Networks 21-Aug-2019
• Understanding Catalyst 2900 and Catalyst 4000 Naming Conventions 25-Feb-2019
• Connecting a Modem to the Console Port on Catalyst Switches 12-Feb-2019
• Spanning Tree Protocol Problems and Related Design Considerations 05-Dec-2017
• Understand and Configure Backbone Fast on Catalyst Switches 19-Apr-2016
• Errdisable Port State Recovery on the Cisco IOS Platforms 23-Mar-2016
• Understanding VLAN Trunk Protocol (VTP) 29-Sep-2014
• Cisco Small Form-Factor Pluggable (SFP) Transceiver Modules Maintenance and Troubleshooting 23-Sep-2014 (PDF - 345 KB)
• Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues 19-Sep-2014 (PDF - 183 KB)
• WCCP negotiation fails with error: WCCP debug message: Here_I_Am packet from x.x.x.x w/bad fwd method 00000001, was offered 00000002 12-Aug-2014
• Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues 27-Oct-2009
• Managing Software Images and Working with Configuration Files on Catalyst Switches 15-Oct-2009
• Hardware Troubleshooting for Catalyst 4000/4912G/2980G/2948G Series Switches 30-Sep-2009
• Troubleshooting Switch Port and Interface Problems 03-Apr-2009

Brochures

• Cisco Switch Guide 07-Sep-2011

White Papers

• Latency Busters Messaging 3.3.9 with Cisco Catalyst 4900M 29-May-2009 (PDF - 1 MB)