Devices running Cisco IOS versions 12.0S, 12.2, 12.3 or 12.4 and configured for Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs) or VPN Routing and Forwarding Lite (VRF Lite) and using Border Gateway Protocol (BGP) between Customer Edge (CE) and Provider Edge (PE) devices...
Devices running Cisco IOS versions 12.0S, 12.2, 12.3 or 12.4 and configured for Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs) or VPN Routing and Forwarding Lite (VRF Lite) and using Border Gateway Protocol (BGP) between Customer Edge (CE) and Provider Edge (PE) devices...
A Cisco IOS Embedded Event Manager (EEM) policy that is based on Tool Command Language (Tcl) can be used on vulnerable Cisco IOS devices to identify and detect an interface queue wedge that is caused by this vulnerability. The policy allows administrators to monitor the interfaces for Cisco IO...
This scenario is better explained with an example. If the native VLAN on the switchport is configured as VLAN 12 and on the AP, the native VLAN is configured as VLAN 1, then when the AP sends a frame on its native VLAN to the switch, the switch considers the frame as belonging to VL...
This is a CVE-2016-6415 vulnerability that Cisco reported remains in IOS software (4.3.x, 5.0.x, 5.1.x and 5.2.x; version 5.3.0 and higher is out of danger), IOS XE (all versions), and IOS XR (all versions) for network equipment. This vulnerability was exploited by the hacker grou...
The bug occurred in various 12.4 mainline IOS versions that were tested and no longer occurred in 12.4(20)T, so it appears to have been fixed in some 12.4 T-train release. Summary routes in both RIPv2 and RIPng use the lowest metric of any child route within their range as the metric...
Cisco made a similar move a few years ago with an architecture called Converged Access. This embedded the wireless controller functionality into IOS XE on the 3650 and 3850 access switches. For various reasons, it did not live up to expectations, and Cisco killed it in IOS XE Everest 16.5....
Like a Cisco IOS router, the security appliance also allows you to press the Tab key to complete a partial command. For example, to enter a show command, type sho and press the Tab key. The security appliance displays the complete show command on the screen. The security appliance allows ...
Let’s see first how to disable Telnet on a Cisco IOS device which covers both Routers and Switches. Each Telnet access to the device (same applies with SSH as well) uses one of the VTY lines (Virtual Terminal lines). You need to have in mind that older IOS versions (before 12.2) ha...
GNS3 Setup Wizard options Explained How to use GNS3, GNS3 terminology, and overview How to add, install, or import IOS in GNS3 Advantages of using packet tracer It is easy to install. The installation process starts in the wizard and provides self-explanatory easy-to-configure options....