Posts Tagged ‘switch’

Cisco vPC with Dell S4810 at ToR

Saturday, September 21st, 2013

Cisco’s vPC technology is similar to Dell’s VLT; it enables an access/leaf switch or server to have single LAG connecting up to two separate switches. This allows for an non-blocking, multipathing scenario. You can read more about Dell’s VLT technology and its advantages on my prior blog, Dell Force10 – Layer 2 Multipathing via Virtual Link Trunking (VLT) In this blog, I will configure Cisco vPC between two Cisco Nexus 5548UP switches [NX-OS 5.1(3)N2(1)] down to a third ToR Cisco Nexus 5548UP switch [NX-OS 5.1(3)N2(1)]. I will then replace the third Cisco Nexus 5548UP switch at ToR with a Dell S4810 switch [FTOS 9.0]. (more…)

Twitt

Configuring PVST+ on Cisco Switches

Wednesday, February 1st, 2012

Per VLAN Spanning Tree Plus (PVST+) is a flavor of Spanning Tree Protocol (see prior blog, Default STP Behavior on Cisco Switches) which maintains a spanning tree instance for each VLAN in the network. This means certain VLAN trunks (using 802.1q) can be forwarded for some VLANs while being blocked for others. Further, changes in one STP domain will not effect other spanning tree instances on other VLANs. Additionally, since each VLAN is treated as a separate network, layer 2 load balancing can be accomplished by forwarding some VLANs on one trunk and other VLANs on another trunk. (more…)

Twitt

Setting-up DHCP on Cisco Routers

Sunday, December 11th, 2011

The Dynamic Host Configuration Protocol (DHCP) provides the capability to automatically allocate reusable network addresses and configuration options to hosts. (more…)

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Recover from a Forgotten Console Password on Dell Force10 E-Series Switches

Friday, November 18th, 2011

Dell Force10 E600i Dell Force10 E600i

In this lab I will use a Dell Force10 E600i chassis [FTOS 8.3.1.1] to demonstrate how to recover if you forget your console password. The first thing to do to prepare for this lab is to log on through the console, set a console password, and reload the chassis as demonstrated below. (more…)

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Cisco Port Security with Dynamic MAC Address Learning

Tuesday, May 31st, 2011

Port SecurityIn this lab I used a Cisco Catalyst WS-C3560G-24TS switch [IOS Version 12.2(40)SE]. Using Cisco Port Security it is possible to associate a static MAC address to a physical port on a switch. This only allows one host with that specific MAC address to connect physically to the specified port. (more…)

Twitt

Setup SSH Access on Cisco Switches

Friday, May 20th, 2011

The Cisco Catalyst WS-C3750G-24TS [IOS 12.2(25)SEE3] switch provides both layer 2 and layer 3 functionality. In this lab I’m going to demonstrate how to setup SSH access to the switch. The first thing I do is set a hostname and assign an IP address to an interface: (more…)

Twitt

Setup Telnet Access on Force10 Switches

Saturday, May 14th, 2011

I am going to use a Force10 S60 switch [FTOS 8.3.3.4] to demonstrate how to setup telnet access. To setup telnet access you first need to set an IP address on either a data port or a managment port so you can access it with telnet. Since the S60 has a management port, I’m going to use that. (more…)

Twitt

Creating a Link Aggregation Group (LAG) in FTOS

Monday, May 9th, 2011

This lab demonstrates how to create a Link Aggregation Group (LAG) in FTOS on Force10 switches. A LAG in Force10′s FTOS is called a port channel and in Cisco’s IOS is called an EtherChannel. As described by IEEE 802.3ad, LAG is a mechanism for combining the bandwidth of multiple physical ports in a switch into one logical link. Therefore, a port channel can be treated as an individual port and can be configured as such (ex: can be set as Layer 2 or Layer 3, can be part of a VLAN, etc.). (more…)

Twitt

How Perl/Python Scripts on Force10 S60 Switches Can Access the Internet

Monday, May 9th, 2011

Force10 S60 Switch

Force10 S60 Switch

Let’s say you have a Force10 S60 switch [FTOS 8.3.3.4] hooked-up at a datacenter that currently has a console connection connected to a management switch that provides external Internet access. The natted IP address is 10.0.8.10/24 and the external IP address is 209.37.21.20/24. Other than the console, the switch is only connected to a local network of other switches and servers. You are running some advanced python scripts natively on the S60 switch (yes, the Force10 S60 switch can run python and perl natively); however, the scripts you’ve written need access to the external Internet. What needs to be done? (more…)

Twitt

Setup OSPF on Force10 Switches

Wednesday, April 27th, 2011

For this lab, I use a Force10 E1200 chassis [FTOS 8.3.1.1] and a Force10 S60 switch [FTOS 8.3.3.4]. The objective is to setup a simple OSPF network. Loopback addresses are used to setup test networks. (more…)

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