Articles in the Networking category
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
<acronym title="Virtual Private Network">VPN
</acronym> are lost, you face the option of changing the existing key (and breaking any users that are currently working), or creating a …
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
Enable SSO …
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 …
This is an annoying problem:
startup-config file open failed (Not enough space)
Directory of nvram:/
%Error opening nvram:/ (Function not implemented)
1048576 bytes total (1034573 bytes free)
Cisco Catalyst switches simulate NVRAM on their flash. Once in a blue moon, this simulated NVRAM will …
If you see an error like the one below in your Cisco ASA log files, check with the other end and make sure your
QM FSM error (P2 struct &0xd7fed708, mess id 0xcc86fb64)!
The QM FSM error message usually relates to a configuration mismatch. Although checking the crypto …