According to dictionary.com, the word “mnemonics” a device such as a pattern of letters, ideas, or associations that assists in remembering something.In the world of networking, for us to easily remember how technology works is by using mnemonics. Here are popular handy mnemonics that can help us. Emergency (0) Every Alert (1) Awesome Critical (2) Cisco Error (3) Engineer Warning (4) Will Notifications (5) Need Information (6) Ice-cream Debug (7) Daily 2. DHCP Process”DORA” Discover D Offer O Request R…
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Objective: To separate management traffic from data/customer traffic on your Cisco Catalyst 4500 L3 Switch Preferably, Data and Management are into 2 separate network domains. Pre-requisite: UTP cable to connect to management port (via FastEthernet 1) and the other end is connected to a network switch to access the OOB management gateway Tested on Cisco IOS Version 15.1 (Cisco Catalyst 4948E) * * Management IP Configuration* * 1. Configure the vrf for management vrf definition management ! address-family ipv4 exit-address-family ! address-family ipv6…
Cisco BVI (Bridge Virtual Interface) enables Layer 3 routing on a bridge group, connecting different Layer 2 networks. BVI (Bridge Group Virtual Interface) is a routed interface that represents a set of interfaces that gets bridge. Here is the sample Bridge Virtual Interface (BVI) Configuration on Cisco ASR 9000. Fig1. Configuration: RP/0/RSP1/CPU0:ASR9000#configure Configure the interface interface GigE0/0/0/0 description Connection to Server1 eth0 l2transport Configure the l2vpn l2vpn bridge group 1000 bridge-domain 1000 interface GigE0/0/0/0 routed interface BVI1000 3.Configure the Bridge…
Interface description is one of the most important configuration when bringing up interfaces between two devices. In a bundle or port-channel interface, there is a way to find the partner interface or which member in that bundle is your interface or port is connected especially if there’s no description or outdated. Here are the steps and commands to find LACP partner interface or port in Cisco Router and Switch Fig1.1 (Cisco IOS-XR) Assuming we have this Fig1.1, two…
Here are the sample answers for interview for Network Engineer/Administrator/Technician job position. Top Networking Interview Questions and Answers Sample Questions Sample Answers Differentiate between hub and switch. Hub has single collision domain and single broadcast domain, while Switch can support single broadcast domain and multiple collision domains. What is a router? Router is used to forward data packets to computer networks What are the OSI Model Layers? Give brief description and examples OSI or Open Systems Interconnection model…
Here are the steps on performing the switchover of Route Switch Processor (RSP) or Route Processor (RP) in Cisco ASR9000 platforms running in Cisco IOS-XR. show redundancy Example: RP/0/RSP0/CPU0:IOS-XR#show redundancyRedundancy information for node 0/RSP0/CPU0:==========================================Node 0/RSP0/CPU0 is in ACTIVE roleNode Redundancy Partner (0/RSP1/CPU0) is in STANDBY roleStandby node in 0/RSP1/CPU0 is readyStandby node in 0/RSP1/CPU0 is NSR-not-configuredNode 0/RSP0/CPU0 is in process group PRIMARY roleProcess Redundancy Partner (0/RSP1/CPU0) is in BACKUP roleBackup node in 0/RSP1/CPU0 is readyBackup node in 0/RSP1/CPU0 is NSR-ready…
Here’s the basic BGP (eBGP) configuration of connecting 3 different router vendors namely Huawei, Juniper and Cisco Routers. Assuming we connect via their physical interfaces and incoming and outgoing policies are basically allow all. Sample Configuration Huawei <Huawei>system-view Enter system view, return user view with return command. [~Huawei] interface GigabitEthernet1/0/0 description Connection to Cisco ip address 192.168.0.1 255.255.255.252 interface GigabitEthernet1/0/1 description Connection to Juniper ip address 192.168.1.1 255.255.255.252 xpl route-filter Cisco-Import approve end-filter xpl route-filter Cisco-Export approve end-filter xpl route-filter…
These are the some commands being used when performing network change or maintenance, depending on the features or services being run in the network. Typically, this is very useful in verification, troubleshooting and comparison between before and after the change. Commands Description Category screen-length 0 temporary display none split screen (useful in collecting info without pause) Basic Command display health display usage information of system resources Resources display cpu-usage display usage of CPU Resources display alarm all display all alarms…
Here are the sample VLAN configuration and commands comparing Cisco Nexus and Huawei switches. VLAN Creation: Cisco Huawei configure system-view vlan 88name VLAN 88 vlan 88name VLAN88 Access Interfaces: Cisco Huawei interface Ethernet1/1description Connection to Server1switchportswitchport access vlan 88no shutdown interface GigabitEthernet1/1/1description Connection to Server1port link-type accessport default vlan 88undo shutdown Trunk Interfaces: Cisco Huawei interface Ethernet2/1description Connect to Switch2switchportswitchport mode trunkswitchport trunk allowed vlan 10,20no shutdown interface GigabitEthernet2/1/1description Connect to Switch2port link-type trunkport trunk allow-pass vlan 10 20undo shutdown…
Filter-Based Forwarding (FBF) or (for some vendor is also called Policy Based Routing (PBR)) is a simple method to route IP traffic to different interfaces on the basis of Layer 3 parameters (e.g. source or destination IP) or Layer 4 parameters (source or destination ports). Example: Objective: – to configure R1 to forward traffic originating from HostX under 10.10.1.0/24 to use ISP-X to reach Server 20.20.20.1 – to configure R1 to forward traffic originating form HostY under 10.20.1.0/24 to use…
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