Informaiton exchanged in VXLAN during MP BGP neighborship

After VTEP devices are established BGP neighbor adjacencies with other VTEPs or with internal BGP route reflector, below three pieces of information are exchanged through BGP.

1. Layer 3 VNI

2. Router MAC address

3. VTEP address

How to get 80 Gbps of bandwidth available to UCS Servers.

Use any of the below UCS below configuration :-

1. Install 2208 IOMs, VIC1280 CNAs, fabric Extenders, and create eight vNICs mapped to each fabric.

2. Install 2204 IOMs, VIC1240 CNAs, and create four vNICs mapped to each fabric.

Configuration failed for node sys/lsnode- due to Invalid Path Configuration,Invalid VLAN Configuration

Configuration failed for node 102 sys/lsnode-<ip> due to Invalid Path Configuration,Invalid VLAN Configuration.

Above error can be due to below reasons:-

1. The "Invalid Path Configuration" fault is raised when there isn't a Physical Domain associated to an EPG using static paths.

2.  The encap VLAN configured is not within the allowed range of VLANs as specified by the associated domain.

3. Cisco Bug: CSCva72039

RSTP port types

1. Backup port :- It acts as a backup for the path provided by a designated port towards the leaves of the spanning tree.

2. Disabled port :- It has no role within the operation of the spanning tree.

3. Root Port:- It provides the best path ( lowest cost) when the device forwards packets to the root bridge:-

4. Root Port:- It offers a backup path towards the root bridge to the path provided by the current root port.

5. Designated port :- IT connects to the device that has the lowest path cost when forwarding packets from that LAN to the root bridge.

IP Source Gaurd

In IP source gaurd,  only on protected ports DHCP traffic is allowed and will block all the rest of the traffic. Whenever switch receives any packet, it allows only if the source is in the DHCP snopping table or static binding.

IP source is a port based feature which automatically creates implicit port access control list(PACL).

Important point:-

1. In case of port-channel, IP source gaurd must be enabled on port-channel rather than on member interfaces.
2. IP source gaurd in not supported on trunk ports.
3. Only supported on layer2 ports.
4. Mac filtering is not supported
5. PVLAn is not supported
6. Only applied to hardware and cannot verify the packets processed by software.

Configuration:-

Router(config-if)# ip verify source vlan dhcp-snooping

Static binding:-

Router(config)# ip source binding mac-address vlan vlan-id ip-address interface interface-name

Verification:-
show ip verify source interface fa0/1

Cisco Prime Service Catalog Definitions.

1. Initiator :- Person who places the order for a service. You are the initiator of orders you place for yourself and orders you place for others.

2. Delivery Plan :- The work flow process established by service catalog administrator to complete a service order after it has pased through the authorization and/or review stages 

3. Service manager :- A service catalog module that is used by the service trams to find an manage their service catalog tasks. 

4. Performer :- An individual or user or queue assigned to complete the task.

5. Customer :- Person receiving a service. you can be the customer of services you order for yourself and for services that others order for you.

ARP types

1. ARP:- It Maps the IP(network layer) address to mac layer address to enable IP packets to be sent across the network

2. Gratuitous ARP:- It sends a request with an identical source IP address and a destination IP address to detect duplicate IP address.

3. Proxy ARP :- It Enable a device that is physically located on one network and appear to be logically part of a different network connected to the same device.

4. Reverse ARP :- It request IP( Network layer) address for the MAC address. Often used by disklesss workstation because this type if devices has no way to store IP address to use when they boot.