You can use SFP or Copper depending on the router ports. Cat cables / twisted pair cable are copper cables commonly used. ... View more

You can configure username and password pairs, which are locally stored on the switch. These pairs are assigned to lines or ports and authenticate each user before that user can access the switch. If you have defined privilege levels, you can also assign a specific privilege level (with associated rights and privileges) to each username and password pair. Configuring Username and Password Pairs Follow these steps to configure username and password pairs: SUMMARY STEPS     1.    enable     2.    configure terminal     3.    username name [privilege level] {password encryption-type password}     4.    Use one of the following:         line console 0         line vty 0 15     5.    login local     6.    end     7.    show running-config     8.    copy running-config startup-config Please refer http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960-x_cg_chapter_0100.html ... View more

Hi Ramesh, Latest release is Release 12.2.55-SE11, please refer mentioned download link. https://software.cisco.com/download/release.html?mdfid=279486442&softwareid=280805680&release=15.0.1-SE2 ... View more

All Catalyst 6800 series line cards support CVR-4SFP10G-QSFP Adapter. Due to power limitations on line card, one port per port-group can be operated on 40G and connected to CVR-4SFP10G-QSFP Adapter. Please refer Table 10-3 40G Ports supported on port groups. http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-3SY/config_guide/sup6T/15_3_sy_swcg_6T/configuring_interfaces.html#57880 ... View more

The Cisco Catalyst 4500E uses a right-to-use (RTU) licensing model. RTU is a trust-based licensing model designed to give customers the flexibility to upgrade, downgrade, or move the license for RMA purpose by using simple EXEC CLI commands. Cisco IOS® XE Software LAN Base: This feature set on the bundles provides Layer 2 features for access. Cisco IOS XE Software IP Base: This feature set is upgradable with a software activation license (SAL). It includes all Layer 2 features and some basic Layer 3 features. ISSU and SSO are supported in this package. Cisco IOS XE Software Enterprise Services: This feature set is upgradable with a SAL; it supports full Layer 3 protocols and advanced features such as complete routing scalability, Border Gateway Protocol (BGP), Virtual Route Forwarding (VRF), Policy-Based Routing (PBR), and so on. These features can be enabled using the software-licensing mechanism. For details about software licensing, refer to the "Licensing" section later in this document or visit http://www.cisco.com/go/sa. Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4500-series-switches/prod_qas0900aecd806d8b06.html ... View more

1) Power down old switch and remove from stack 2) On new switch load same IOS and feature set as exiting stack members 3) On new switch change switch member number and priority  to the old switch member number and priority ( you can find this on the live stack by sh switch command as the provision from old switch should still exist 4)save the config and power down new switch 5) reattached new switch to stack via stack wise cabling and power new switch up ... View more

Please refer mentioned link, it leads to the same topic on this community. https://supportforums.cisco.com/discussion/13067841/what-different-between-distance-vector-and-link-state-routing-protocol ... View more

Frame Relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology. Originally designed for transport across Integrated Services Digital Network (ISDN) infrastructure, it may be used today in the context of many other network interfaces. ... View more

Data is transported over a network by three simple methods i.e. Unicast, Broadcast, and Multicast. So let’s begin to summarize the difference between these three:     Unicast: from one source to one destination i.e. One-to-One     Broadcast: from one source to all possible destinations i.e. One-to-All     Multicast: from one source to multiple destinations stating an interest in receiving the traffic i.e. One-to-Many ... View more

When a large amount of CDP neighbor announcements are sent, it is possible to consume all memory of an available device. This causes a crash or other abnormal behavior. Reference: http://www.cisco.com/c/en/us/support/docs/network-management/discovery-protocol-cdp/43485-cdponios43485.html ... View more

You can refer Known Fixed Releases on Bug Search Tool. https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuw30999 ... View more