Network Learners

Returns (RMAs), Warranties and End-of-Life Information Table of contents Hardware Returns Warranty Coverage Period Troubleshooting before Returns Product Trial Returns Avoiding Licensing Issues  Refund Requests Shipment Preparation Product End-of-Life (EOL)  Summary End-of-Life Products If your Cisco Meraki device fails and the problem cannot be resolved by troubleshooting,  contact support  to address the issue. Once support determines that the device is in a failed state, they can process an RMA and send out a replacement device free of charge. In most circumstances, the RMA will include a pre-paid shipping label so the faulty equipment can be returned. Note that, for end-customer device security, RMAs may only be requested by Full Organization Write Admins, or Network Write Admins (for only devices in networks they are Admins of). Meraki Support will not process RMAs unless the support agent can verify the r...

Private IP Address A private IP address is assigned to an instance's network-interface by the DHCP server. The address is visible from within the instance by using a command like “ip a”. The address is typically part of a private network and is used for communication between instances in the same broadcast domain via virtual switch (L2 agent on each compute node). It can also be accessible from instances in other private networks via virtual router (L3 agent). Floating IP Address A floating IP address is a service provided by Neutron. It's not using any DHCP service or being set statically within the guest. As a matter of fact the guest's operating system has no idea that it was assigned a floating IP address. The delivery of packets to the interface with the assigned floating address is the responsibility of Neutron's L3 agent. Instances with an assigned floating IP address can be accessed from the public network by the floating IP. A floating IP address an...

QoS Notes QOS: The TX-ring (hardware queue) is always FIFO. Use  show controller | i tx_limit. Queuing & Shaping can only be applied in an  outbound  direction to an interface. Policing can be applied  inbound  or  outbound  direction to an interface. If ACL does not exists, it is  match-all  traffic. cache-flow, is taken BEFORE any packet markings   Local marking won’t show on the router, except one hop away. DSCP: IP   precedence   6 and 7 should not be used according to Cisco Systems. It's used for control plane packets, protocol update, etc by the routing protocols. DSCP Binary Dec. IP Precedence comments Default 000000 0 routine CS1 001000 8 priority AF11 001010 10 AF12 001100 12 AF13 001110 14 CS2 010000 16 immediate AF21 010010 18 AF22 010100 20 AF23 010110 22 ...