Articles tagged with cisco

  1. Fast and Furious: Examining the 30-Second Load Interval

    Posted on in networking

    The load-interval command in Cisco IOS allows network administrators to define the time frame used to calculate interface load statistics. By default, this interval is set to 5 minutes, providing a broad overview of traffic patterns. However, some situations might call for a more granular view. Here's a breakdown of …

  2. Troubleshooting "%TAC+: no address for get_server" on Cisco Devices

    Posted on in networking

    The error message "%TAC+: no address for get_server" can send shivers down the spine of any network administrator. It signifies a problem with TACACS+ (Terminal Access Controller Access-Control System Plus), a crucial security protocol for user authentication, authorization, and accounting (AAA) on Cisco devices. But fear not, for this guide …

  3. Demystifying Throughput: A Deep Dive into TTCP on Cisco Platforms

    Posted on in networking

    In the labyrinthine world of network troubleshooting, pinpointing performance bottlenecks can feel like navigating a maze blindfolded. While various tools exist, the Cisco Test TCP (TTCP) utility often emerges as a hidden gem for gauging real-world throughput on network paths. This article embarks on a comprehensive exploration of TTCP, uncovering …

  4. Testing Network Performance with "Tclsh iperf" on Cisco

    Posted on in networking

    Network performance testing is a critical aspect of maintaining and optimizing a network, ensuring it meets the demands of modern applications and services. If you're using Cisco networking equipment, you have a powerful tool at your disposal: "Tclsh iperf." In this comprehensive guide, we'll walk you through how to utilize …

  5. load-interval 30: For and Against

    Posted on in networking

    The "load-interval" command is used in network configuration settings, particularly in Cisco routers and switches, to specify the interval at which the interface's load statistics are updated and collected. Setting "load-interval 30" means that the device will collect load statistics for the interface every 30 seconds. The choice of this …

  6. TACACS Detected 'Invalid Argument'

    Posted on in Networking

    As always, I've changed pertinent details for reasons.

    I was working on an ASR the other day and received the follow error:

    RP/0/RSP0/CPU0:ASR9K(config-tacacs-host)# commit
    Fri Jul 29 12:55:46.243 PDT
    
    % Failed to commit one or more configuration items during a pseudo-atomic
    operation. All …
  7. [Cisco] Telnet/SSH work, HTTP Gives Permission Denied

    Posted on in Networking

    Here are a few tips that might be helpful if you are having trouble accessing your Cisco router or switch via the web server.

    • Make sure you have the right password! This is pretty obvious, but it's definitely the first thing worth checking.
    • If you're using aaa new-model, you will …
  8. Disable Spanning-Tree Per VLAN

    Posted on in Networking

    If you need to disable spanning-tree on a particular VLAN in your Cisco-based network, use the following command:

    Switch(config)# no spanning-tree vlan 13
    

    This will disable spanning-tree on unlucky VLAN 13.

    If you have some good examples of why you might want to disable spanning-tree for a VLAN, please …

  9. Recover Lost Pre-Shared Keys

    Posted on in Networking

    Not everyone has a great password maintenance process. If you run into a situation where the group pre-shared keys for your VPN are lost, you face the option of changing the existing key (and breaking any users that are currently working), or creating a new group with a new key …

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