Articles in the networking category
The most popular network reliability technologies in 2023 are:
- Network automation: This is the use of software to automate network tasks,
such as provisioning, monitoring, and troubleshooting. Network automation can
help to improve network reliability by reducing human errors and increasing
- AIOps (Artificial Intelligence for IT Operations): This is …
TCP1323Opts is a registry value that controls the use of the TCP Timestamp and
Window Scaling options. These options are described in
RFC 1323, which is an update to the
original TCP/IP specification.
The TCP Timestamp option allows TCP to measure the round-trip time (RTT) between
two hosts. This …
As always, I've changed pertinent details for reasons.
I was working on an ASR the other day and received the follow error:
Fri Jul 29 12:55:46.243 PDT
% Failed to commit one or more configuration items during a pseudo-atomic
operation. All …
For those that are really into privacy, the Privacy Extensions defined in
RFC 4941 are a really good thing. This
extension circumvents SLAAC and has the result of randomizing your IPv6 address.
Like I said, if privacy is a big deal for you, this is definitely something you
want enabled …
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 …
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 …
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 …
On occasion, you may need to put your Cisco IPS into bypass mode. Bypass mode
allows the IPS to pass traffic without inspecting it. This may be useful if you
suspect the IPS is causing a problem, if you are going to run a one-time scan
that would set the …
When you get your brand new Cisco ASR1000 series router, Stateful Switchover
(SSO) is disabled by default:
Router# show redundancy states
my state = 13 -ACTIVE
peer state = 1 -DISABLED
Mode = Simplex
Unit ID = 6
Redundancy Mode (Operational) = Non-redundant
Redundancy Mode (Configured) = Non-redundant
Redundancy State = Non Redundant
You've certainly noticed when look at individual BGP routes on your Cisco routers
that the route is advertised to specific update-groups. It isn't obvious from that
output just what those update-groups are.
Router#show ip bgp 184.108.40.206
BGP routing table entry for 220.127.116.11/24 …