Category: Switches & Routers

Port Security on Aruba Switches

Configuring Port Security Functionality  The port security functionality will be configured as part of the port level security configuration. This profile can be attached to the interface.  Configuring RA Guard Functionality   RA Guard functionality can be enabled at the port level. Configure the RA guard as part of the port level security configuration and attach to […]

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Throwback Thursday: Networking “5,4,3” Rule…

Back in the day there was an old rule we called the “543” rule. The 5-4-3 rule divides the network into two types of physical segments: populated (user) segments, and unpopulated (link) segments. User segments have users’ systems connected to them. Link segments are used to connect the network’s repeaters together. The rule mandates that […]

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Setting Up SSH On The Cisco ASA

SSH access is critical when it comes to managing your networking equipment. In this tutorial I will show you how to enable SSH access on the Cisco ASA. Just enter the following commands in a configuration terminal and you will be all set. asa(config)# crypto key generate rsa general-keys modulus 2048 asa(config)# username testuser password […]

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Setting Up SNMP on Juniper Switches

This is a pretty easy process, but is critical for the long term management of our networking infrastructure. In order to setup SNMP on the Junipers, these are the steps that must be followed. Use the information contained within this tutorial as well so that all devices have the same SNMP settings. Log into the […]

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Configuring LLDP for Cisco & Juniper Switches

The Link Layer Discovery Protocol is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet. Ideally, this is great to use to make sure that switches are talking to each other prior to […]

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Adding a DHCP Scope to a Juniper Switch

Using the information below, we will setup DHCP on the Juniper QFX5110. This tutorial is assuming that you have already setup VLAN’s and assigned them to whichever port. We will assume that the port in this instance is VLAN 152. VLAN ID: 152 VLAN Name: AGENCY-DHCP VLAN IP: 10.10.152.1/24 Log into the switch VIA SSH/Console/Telnet/etc… Once logged in, enter […]

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Adding VLANs to a Juniper Switch

I absolutely love Junipers products, but coming from a Cisco background they are a tad bit different when it comes to configuring. These beasts run off of JunOS, which to my understanding is a variant of CentOS. If you are a Linux nerd like myself, this shouldnt be an issue for. Using the information below, […]

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Switch Security Facts

The following table lists switch features that can be implemented to increase network security:  Feature  Description  Virtual LAN (VLAN) A virtual LAN (VLAN) is a logical grouping of computers based on switch port.  VLAN membership is configured by assigning a switch port to a VLAN. A switch can have multiple VLANs configured on it, but each switch […]

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Switch Attack Facts

The following table lists common attacks that are perpetrated against switches.   Attack   Description   MAC flooding   MAC flooding overloads the switch’s MAC forwarding table to make the switch function like a hub. MAC flooding is performed by the following method:   The attacker floods the switch with packets, each containing different source MAC addresses.  The flood of packets fills up […]

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VSS on Cisco 4500/4500X Switches

Post originally written by Betsy Yu from Router-Switch.com The VSS–Cisco Virtual Switching System is a clustering technology that pools two Cisco Catalyst 4500-E Series Switches with Cisco Catalyst Supervisor Engine 7-E or 7-LE or two Catalyst 4500-X Series Switches into a single virtual switch. In a VSS, the data plane of both clustered switches is active at the same time in both […]

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