Cisco Data Center Theory note-3

=====port channel=============

stp-Anti-ring
pch-bandwidth utilization increases, logically single-link l2/l3 can be used
No protocol-on
Have negotiated-LACP

VPC---Pure two layer
The solution is to cross the box only 2 units, logically 2 sets of logic one

Vpc:
Domain Id,peers
Pkl:peer Keep Live UDP3200, it is not recommended to back--->check alive
Pl:peer Link, the Gigabit Ethernet link backs back, is the port channel--->transfer data
Member Port dual upstream, orphan Port single uplink
CFS OE: A bunch of control surface information
Roles:primary sencondary
Peer gateway-The default open


VPC member Port down has consequences: no additional consequences

PKL down: Do each of the things

PL Down (PKL fine): Seconday member ports suspend

PKL down and PL down===> double/brain split each to make a

Remediation: Auto Recovery




============febric path==========
Trill
FP-----eve--are mostly auto-configured


/SPINE-LEAF--FP Solutions for the sophomore tier
It's less used by Vxlan.

FP Port:
Core Ports--->fp/edge ports--->ce
Control Surface: L2 ISIS itself forms the corresponding table of the switch ID---IF

Unified PORT:ENTHERNET/FC
Unified Fabric:fcoe

======SDN & cloud====================================
Sdn:rest API

Clinet----> HTTP--->server/provider---> Server
Server----> HTTP---->json/xml----> Clinet

SDN Automation Controller
NB North to standard-----up---human----rest API
SB South to standard-----down-----Device----netconf

Cloud computing:
Self-Service
Scalable
Pooling of resources (virtualization)
can be accessed at any time
Iaas:infrastruture as a service
Paas:platform as a service
Saas:software as a service

Ucsd:ucs director equals Cloud management platform

==========NP process=======
n7k startup process:
Kenerl:boot Flash: ****kickstart.bin
No Mantennace mode
(boot) Load Bootflash:***.bin


Two-tier protocol:
Stp:rapid pvst/pvrst+/mst

Toolkit:
Loop Gurad: Configure the port to avoid entering the foward state and only take effect on a single device.

-----Unidirectional Link problem-----

BA Bridge Assurance: Requires two segments of the link, all port states can be equipped to ensure that the link does not go into the loop state

UDLD: Does not rely on bpdus. One-layer Check device connection

=====vpc======
Configuration process
Interface Edage) # VPC Memeber 100
Dual Xia Lian: member Port
Single Xia Lian: Oraphe port

Standard VPC = = multiple layers
Enhance VPC
VPC over fp=== VPC Plus
VPC over Vxlan
VPC over ACI
VPC Guidelines:
1-switch Type Platform
2-link speed:10gbp+
3-VPC Keep Live (up to three layers)
4-VPC Peer Link: Wanchaoca
5-number of VPC Peers:2
6-number of VPC Domain PER switch:1
7-routing "VPC Peer-gateway"


====fex=====
Fex: Is the remote board Fex and VN tag, which relies heavily on the parent

Fabric Path:mac in MAC


====otv========
Mac in IP
DCI Technology for interoperability across data center Macs, allowing two of inter-site VLANs to interoperate
Edge devices:n7k
Internal INTERFACS: Two-layer flow
Join interface: Multicast traffic
Overlay interface: Do the encapsulation

Mac routing--Conftrol plane:isis
Dynamic encap of L2 in L3

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This article from the "Erick" blog, declined to reprint!

Cisco Data Center Theory note-3