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Connected a 3Com 2952-SFP Plus switch to a Cisco 3750 switch via fibre. There is a light on the 3Com end, but nothing at the Cisco end, and no traffic will flow. Have swapped SFP's, have swapped fibre cables, have used a different port on the Cisco, have even swapped the 3Com switch, but still no…
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I have one CISCO 2906g and hp 2626 switches i link them by MM fiber optic cable, the problem the cant communicate with each other, i verify there is no problem with cable and JBC's. win i connect other HP switch in the other end it will communicate without any problem, but not with CISCO
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We have a database in which all the PKs are GUIDs, and most of the PKs are also the clustered index for the table. We know that this is bad (due to the random nature of GUIDs). So, it seems there are basically two options here (short of throwing out GUIDs as PKs altogether, which we cannot do (at…
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Repository pattern - Switch out the database and switch in XML files.
Hello
I have an asp.net MVC 2.0 project and I have followed the Repository pattern.
Periodically, I am losing access to the database server so I want to have another mechanism in place (XML files) to continue developing. It is…
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We have a database in which all the PKs are GUIDs, and most of the PKs are also the clustered index for the table. We know that this is bad (due to the random nature of GUIDs). So, it seems there are basically two options here (short of throwing out GUIDs as PKs altogether, which we cannot do (at…
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I am using arping -D to detect duplicate IP addresses within a network when setting up servers. (The network is controlled by someone else, and we have had many issues with IP allocation in the past.) It works fine as long as my host has a single NIC on a given VLAN, but when my host has more than…
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there is a network including a router, two hosts and a switch which connects hosts to router. i have a virtual machine on my system. the network adapter is set to act as bridge. so the virtual machine and real OS are my 2 hosts on different LAN. they use one network card and are connected to a switch…
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We have a Domino 9.0.1 Server hosted on Ubuntu 14.04 Server, which hosts several other http based Tasks, (Nginx, Couchdb, Confluence on Tomcat).
The Ubuntu Server has multiple IPs, all bind correctly to the different Tasks.
The Domino SMTP task binds correctly and is working well.
All http tasks…
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I'm having a strange issue with one of the networks I manage recently. We have about 14 different networks connected together through a Netgear hardware VPN. Everything has been running fine (other than standard connectivity problems) for a few years now, but I've hit a wall with a problem that's…
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This has bothered me for quite a while but I never found out why or how to change the behavior.
ip duplicates could be caused by typos or dhcp errors etc., but they do occur from time to time.
in rpm-based systems such as centos, the old server with the duplicate ip wins, and the new server will…
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