Networking - Misr

Networking

A collection of 5 posts

The Mikrotik DHCP Relay Process

The Mikrotik DHCP Relay Process

Introduction There appears to be a subtle distinction in how Mikrotik manages the DHCP relay process compared to other vendors such as Cisco and Aruba. Unlike these vendors, Mikrotik sources DHCP Discover and Request packets using the address of the egress interface, rather than the GIADDR/Proxy address Below is

Configuring Layer 2 Access Lists/vACLs

Configuring Layer 2 Access Lists/vACLs

Introduction If the switch is a multilayer switch, you can restrict intra-vlan traffic, provided that the traffic passes through the switch. Step 1: Define Access List ip access-list extended PROTECT-PHONE permit ip 10.0.15.0 0.0.0.255 10.0.15.0 0.0.0.255 Step 2:

Differences between PACL, VACL, and RACL

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Differences between PACL, VACL, and RACL

Summary: When a PACL, a VACL, and a RACL are all configured in the same VLAN, the ACLs are applied in a specific order, depending on whether the incoming traffic needs to be bridged or routed: Bridged traffic processing order (within the same VLAN) 1. Inbound PACL on the switchport

Useful Cisco Commands

Useful Cisco Commands

"Is traffic actually using that new route?" (config)# ip cef accounting non-recursive per-prefix sh ip cef $subnet/$mask "Is anyone sending me traffic to unroutable destinations?" debug ip cef drops "What changed between the running and startup config?" show archive config differences nvram:startup-config

How to remotely conduct 4G Failover testing on a Cisco Router

How to remotely conduct 4G Failover testing on a Cisco Router

Prerequisites test that the cellular interface is up ping 8.8.8.8 source-interface cellular 0/0/0 if there is no response, then power-cycle the cellular module and test again test cellular 0/0/0 modem-power-cycle // this is a hidden command so if it doesn't come up,