Cisco Data Center Theory note-4

====multicast basic=======

BUM:

Broadcast:

Unknown unicast: Unknown unicast

Mulitcast: Multicast segment 224.0.0.0/4, source only send one copy, transfer copy, recipient accepted.

239.0.0.1

239.0.0.2

239.0.0.0/24 \ \ Equivalent to private network

232.0.0.0/8---SSM

224.0.0.X/24---protocol

Data plane:show IP Mroute

Non-specific sources:

(*,G)----out interface List oil----allowed outbound interfaces will do multicast replication

RPF (multicast anti-ring mechanism)--RP

Specific sources:

(s,g)-----Oil----Replication

Rpf-s

Control plane:

The recipient claims to be willing to join the group, using L2 LGMP

L2:lgmp/mld

L3:PIM---Multicast tree convergence protocol to form a forwarding post and PIM neighbor

=====igmp/mld========

IGMP is a two-layer protocol, and IPV6 uses MLD. Both effects are the same

Join, leave,..... Report on your location.

Version has V1 V2 V3,V1 No, because there is no leave mechanism

V2 default----Join group, cannot join a specific source------ASM non-specific source (any source multicast)

V3 (IP IGMP version3)---Join specific source----SSM specific sources multicast (specific source multicast)

show ip IGMP interface brief

Show ip IGMP groups 239.0.0.1

IGMP snooping is turned on by default for switch-to-leaf routers on switches. Function: Determine WHIHC ports need to receive multicase traffic.

=========== Tree =============

The process of tree convergence is the process of table convergence.

SOURCE tree-Tree: Optimal path, corresponding (S,G)

Shared tree-share tree: Must be in the convergence point (rp-rendezvous points), benefits save entries

IGMP V2----PIM----RP----share tree (*,G) ===== can toggle the source tree (S,G) to generate the optimal path.

Bidir (bidirectional tree)---Pim---RP---SHARE tree, never switch to the source tree. There is no specific source and recipient, the recipient can be the source, and the sender can be the recipient. ===== "Vxlan use = = = The bidirectional tree principle that the flow into the RP is optimal

IGMP V3-----PIM-----S---srouce tree (s,g)

PIM-SSM Be sure to find the source

PIM-SM sparse-mode----Default----Be sure to configure the RP----ASM (any source)

PIM-DM---Data center does not support DM

PIM bidir----RP

Multicast configuration: igcmp/pim/rp--static RP address each device must be the same

=============================================

OTV & Multicast

OTV three Layer two layer information

Control Pane---ASM (multicast)/ADJ (unicast)---each form a neighbor distribution list----Tambo Update entry

Data Pane---SSM

ED----ISIS forms neighbor----unicast neighbor

ISIS----MAC Update

Feature OTV

Interface OV1

OTV Join-inter

OTV Extend-vlan

Un:otve Adj/use-adj

Mu:otve Control-group 239.1.1.1

OTV Site-id 0x, same site to the same

OTV Site-vlan

OTV Data-group 232.0.0.0/8 < for multicast >

=======lisp========

Location ID Split

Site Boundary Itr/etr (both ends of tunnel)---encapsulated with LOC ID

Encapsulating IP with outer information

All entry information is to be registered in mapping server.

MR---used to accept requests.

======vxlan=========

Vlan:12bit Vlanid,

Gateway:svi

Overlay:l2 over L3

VXLAN: Two-layer Borderless SDN as a general-purpose technology

24bit Vnid (million)

Control plane----MP BGP

VNI Mapping:bidir-pim

Data Plane---ARP/PIM

MACB----Vtep

Physical Equipment: NVE

Vxlan Tunnel endpoint: VTEP

Dci:data Centern Interconnect

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

Cisco Data Center Theory note-4