Setting Up a Syslog Server

In the field of networking it is very useful to have a centralized location for your logs as the system itself (the network) is distributed. Syslog is the usual method of collecting the logs. There are lots of different solutions …

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Juniper SRX Old and New DHCP, with Problems

At some point I tried to configure Juniper SRX100 with DHCPv6 server, with no luck. The configurations didn’t just work. I gave up at that time, but returned to the matter some days ago. I realized something in Junos DHCP …

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Cisco Nexus FEX Lineup

Cisco has had Fabric Extenders in their Nexus datacenter switch portfolio since 2009. Since there are various models and they all are still appearing in the datacenters here is a summary of all the different FEX models. Updated on 12-Oct-2014: …

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Cat6500/6800 IOS 15SY Feature and Packaging Information

Have you ever wanted to find out what are the differences in Cisco Catalyst 6500/6800 IOS packages (or feature sets)? This is apparently the best source I’ve ever found: Cisco IOS Software Major Release 15SY on Cisco Catalyst 6500 Series …

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Hostname or Path? Does It Matter?

I was recently taken to a discussion: Should the online service or application name be included in the hostname or the path of the site address? The actual discussion went a bit differently but the basic idea was just that. …

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Home Computing History

I did some inventory once again in my cabinets and found some remains of my previous computers and old accessories. The old hard disks are being wiped as I write this (IDE-USB adapter FTW!) so that I can throw them …

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QSFP+ Specifics on Nexus 5500 and Nexus 6000 Series Switches

Some of you may be interested in QSFP+ connections with Cisco Nexus 5500 and Nexus 6000 series switches. The scope of this post is not to present all the different flavors of QSFP+ pluggables or all QSFP+ capable devices but …

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Originating Default Route in OSPF in Junos

I have a Junos router (Juniper SRX) with the default route pointing to the ISP (IP and default route assigned by DHCP) and a pair of Cisco Nexus switches with OSPF routing between all the boxes. I needed to originate …

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Junos authentication-order Configuration

In Cisco IOS you usually configure RADIUS or TACACS+ authentication with local user database as a backup, and you explicitly define the “local” keyword to tell that the local database is used if external servers are not responding. If the …

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Review: Sena Parani-SD1000 Bluetooth Serial Adapter

I have always disliked using serial console connection to a switch or other network device with my laptop. The serial cable just ties me to that particular place and device. Depending on the situation you may have options like using …

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