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Scenario:2 physical interfaces bundled together (port-channel) and associated in the same vlan. Tested in:Cisco NexusJuniper EX Series Steps Cisco Juniper Configure 2 physical interfaces interface Ethernet1/1description Server Link#1switchportswitchport access vlan 888channel-group 99 mode activeno shutdown interface Ethernet2/1description Server Link#2switchportswitchport access vlan 888channel-group 99 mode activeno shutdown #set interfaces xe-0/0/0 description ” Server Link#1 “#set interfaces xe-0/0/0 gigether-options 802.3ad ae99 #set interfaces xe-1/0/0 description ” Server Link#2 “#set interfaces xe-1/0/0 gigether-options 802.3ad ae99 Configure the port-channel interface port-channel99description Server Port-channelswitchportswitchport access…

Cisco Juniper

This is a sample steps of migrating IP configuration from physical interface to bundle interface. Take note that this may result service impact during the migration as the existing interface need to be shutdown and re-configure. Remember to shift your traffic prior with the maintenance. Existing Config: freenetwork@MX1-re0> show configuration interfaces et-0/0/1 description “Link to Switch1”; unit 0 { family inet { address 192.168.0.1/24; } family inet6 { address fdf8:d3f5:1a47:bc09::1/64; } Fig.1 Shutdown the physical interface and remove existing configuration…

Juniper

Objective: To separate management traffic from data/customer traffic in your Huawei Routers Preferably, Data and Management are into 2 separate network domains. Pre-requisite: UTP cables (for each MPU management port in case for switchover) are connected to a network switch to access the OOB management gateway To go configuration mode: system-view To preview configuration change before commiting display configuration candidate * * Management IP Configuration* *  a. Configure the vpn instance for management ip vpn-instance <vpn instance name> description <description> ipv4-family b. Set…

Huawei

Transmission Control Protocol (TCP) – is a connection-oriented communications protocol that is used to ensure reliable transmission of packets between computing devices in a network. User Datagram Protocol (UDP) – is a connection-less communications protocol that is used especially for time-sensitive and low latency transmissions across the network. Here’s a table of comparison: Parameter TCP UDP Protocol connection-oriented connection-less Header Size 20 bytes Static header 8 bytes Checksum Compulsory Optional Overhead Heavy as it needs 3 packets to setup a…

Networking

uRPF or Unicast Reverse Path Forwarding is a security feature/tool that help verifies reachability of source address in packets being forwarded. It can prevents malicious and spoofing attacks as it will perform forwarding table lookup on the source IP address. – it as defined in RFC3704 – it follows RFC2827 for ingress filtering. –  it relies on the CEF (Cisco Express Forwarding) or FIB table to perform lookups. – preferably implemented at the network edge facing internet, customers and servers…

Juniper

uRPF or Unicast Reverse Path Forwarding is a security feature/tool that help verifies reachability of source address in packets being forwarded. It can prevents malicious and spoofing attacks as it will perform forwarding table lookup on the source IP address. – it as defined in RFC3704 – it follows RFC2827 for ingress filtering. –  it relies on the CEF (Cisco Express Forwarding) or FIB table to perform lookups. – preferably implemented at the network edge facing internet, customers and servers…

Cisco

Some Useful 10GBASE Small Form-Factor Pluggable (SFP) Transceiver Modules Model Distance Wavelength  Mode Medium Interface  Temp. SFP-10G-SR 300m 850nm Multimode Fiber Duplex LC 0-70℃ SFP-10G-LR 10km 1310nm Singlemode Fiber Duplex LC 0-70℃ SFP-10G-LRM 220m 1310nm Multimode Fiber Duplex LC 0-70℃ SFP-10G-ER 40km 1550nm Snglemode Fiber Duplex LC 0-70℃ SFP-10G-ZR 80km 1550nm Singlemode Fiber Duplex LC 0-70℃ Parameter 10GBASE-LR 10GBASE-ER 10GBASE-ZR Transmit Power (max) −1.0 dBm 2.0 dBm 4.0 dBm Transmit Power (min) −6.0 dBm −1.0 dBm 0.0 dBm Receive power…

Networking

Here is an example on how to query or display optical power of an interface in a Huawei Router. This is tested using NetEngine40E Universal Service Router or NE40E running version 8.x OS. display interface <interface> extensive Sample Output: (Can see link down and not receiving any power from the neighboring device) <Huawei-NE40E>display interface GigabitEthernet1/1/1 extensive GigabitEthernet1/1/10 current state : DOWN(LOS) (ifindex: 142) Line protocol current state : DOWN Link quality grade : — Port BW: 10G, Transceiver max BW:…

Huawei

Here’s a comparison table between the two network models: Open Systems Interconnect (OSI) vs Transmission Control Protocol/Internet Protocol (TCP/IP) Similarities: both are defined in layered architecture both define standards for networking both are logical models both provide framework for creation and implementation of  networking standards and devices both models simplify network troubleshooting process Differences: OSI is protocol independent standard while TCP/IP model is based on standard protocols which Internet has developed OSI model is developed by International Standard Organization (ISO)…

Networking

  Here’s you can choose to remember the 7 Layers of Open Systems Interconnection (OSI) From Application to Physical: (A)pplication (A)ll (P)resentation (P)eople (S)ession (S)eem (T)ransport (T)o (N)etwork (N)eed (D)ata Link (D)ata (P)hysical (P)rocessing Some other Mnemonics are: A Penguin Said That Nobody Drinks PepsiA Priest Saw Two Nuns Doing PushupsAll Pros Search Top Notch Donut Places From Physical to Application: (P)hysical (P)lease (D)ata Link (D)o (N)etwork (N)ot (T)ransport (T)hrow (S)ession (S)ausage (P)resentation (P)izza (A)pplication (A)way Some other Mnemonics are:…

Networking