Below are my notes for the CCNP Routing & Switching SWITCH 300-115 certification exam. I used two Cisco 3560 switches and GNS3 to perform my labs. For theory, I used Cisco Configuration Guides and the Cisco Press Official Certification Guide. Hot Standby Router Protocol, HSRP, is a Cisco proprietary protocol to make multiple routers or…
EtherChannel Guard is a way of finding out if one end of the EtherChannel is not configured properly. This could be that there are some parameters not matching up such as duplex and speed. Or it could be that one side is a trunk and the other isn’t. When there is a misconfiguration found, the…
VLAN Trunk Protocol (VTP) is a Cisco-proprietary protocol used to replicate VLANs using Layer 2 trunk frames to other switches. It is a method to ease administration by selecting a switch to be configured as a VTP server. VLANs are configured on the VTP server and then replicated to other connected switches, called VTP clients….
[youtube http://youtu.be/uU1CRuuSBQo] A trunk will allow multiple VLANs to transport between switches. Trunk ports can be configured in two ways, the Cisco proprietary Inter-Switch Link, ISL, or with the standard IEEE 802.1Q Personally, I don’t use ISL and you shouldn’t either. But lets understand its differences with 802.1Q. Inter-Switch Link (ISL) ISL is Cisco proprietary in…
VLANs are in every network environment. Whether you’re configuring end-to-end or local VLANs you are segmenting the network into logical groups. Before getting into the configuration of a VLAN, there are some best practices to be aware of: Avoid using VLAN 1. Put unused ports on an unused VLAN. I like to use VLAN 999….
