The document discusses Huawei's Cluster Switch System 2 (CSS2) architecture and Super Virtual Fabric (SVF) networking concepts. CSS2 provides high performance and availability by clustering switches through CSS cards, with the lowest inter-chassis delay of 4 microseconds. The SVF creates a logical network by configuring service profiles on a parent device and binding them to access switch port groups. It supports both distributed and centralized packet forwarding. Key SVF features include template-based configuration, policy association, and service chain orchestration through tunnels between orchestration and service devices.
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3. 2
Introduction
• A cluster switch system (CSS),
is a logical switch consisting of two clustering-capable switches
• Cluster Switch System 2 (CSS2) Architecture
•High Performance
•High Availability
7. 6
CSS2 forwarding model
Chassis 1 Chassis 2
Service
card
Service
card
Service
card
SFU
Service
card
SFU
Service port cluster forwarding model
SFU
Service
card
Service
card
Service
card
Data packets Cluster cable
Chassis 1 Chassis 2
SFU
Service
card
• Twice switching with service port cluster vs. once with CSS2
• 4 μs inter-chassis delay in CSS2
Data packets Cluster cable
CSS2: Lowest Inter-Chassis Delay
9. 8
Super Virtual Fabric (SVF) - Concept
• Parent
A parent is an aggregation device that manages and
configures an SVF system.
• Client
Client refers to all access devices, including wired access
devices (ASs) and wireless access devices (AP)
• Level-1 AS
Directly connected to the parent or is connected to
the parent across a Layer 2 network.
• Level-2 AS
Directly connected to a level-1 AS.
• Access point (AP)
When APs access an SVF system, the parent
functions as an AC to control and manage all the APs
in the SVF system.
11. 12
Network Basics
(Mandatory)
VLAN assignment
LAN
configuration
Specifying ports
Partition a logical
network.
Network Security
(Optional)
Edge security
configuration such as
IPSG, ARP rate limiting,
storm control, and so
on
QoS
Port isolation
The logical
network is secure
and reliable.
User Access (Optional)
AAA configuration including the
authentication template, RADIUS
server, and Portal Server
Authentication mode: 802.1x, MAC,
and Portal authentication
Terminal users can
connect to the network
and obtain network
rights.
Service Profiles
Network basic profile
(mandatory)
Network security profile
(optional)
User access profile
(optional)
Configure service profiles
on the parent.
Specify the AS port group
on the parent.
Bind service profiles to the
port group. Then services in
the service profiles are
delivered to all the members
in the group.
Profile-based Configuration
12. 13
Policy Association
The SVF-Parent authenticates all users and delivers policies for
dynamic authorization after users are successfully authenticated. User
policies can be enforced on the SVF-Parent or delivered to access
devices from the SVF-Parent and enforced on access devices.
Advantages
Simplifies management to the maximum degree, allows flexible
deployment of local and remote authentication, rejects unauthenticated
users to ensure security. The SVF-Parent provides fine-granular
access control.
CAPWAP tunnel
Core agile switch
Agile
campus
network
User policies
(UCL/ACL, VLAN,
QoS, and so on)
Policy
association
delivery
Access switch
Authentication point
Management point
Enforcement
pointEnforcement
point
Controller
eSight
Accounting server
SVF
Access switch
Policy Association
13. 14
CSS
Distributed (Local) Forwarding
SVF-
Parent
SVF-
Client
• Each device looks up outbound interfaces of packets in its
local forwarding table and forwards packets from the
outbound interfaces directly.
• This mode makes full use of each device's bandwidth.
Centralized Forwarding
CSSSVF-
Parent
SVF-
Client
• Packets are sent to the SVF-Parent.
• All user ports and AS downlink ports are isolated.
Distributed and centralized forwarding can be configured using CLI
The CAPWAP tunnel between the AS and SVF-Parent transmits only control information but not wired data flows. An AP and the SVF-Parent providing native
AC establishes a CAPWAP tunnel to transmit wireless data flows in a centralized manner.
L3 routing
L2 switching
L3 routing
L2 switching
Packet Forwarding Rules in the SVF
14. 15
SVF Networking Important Features Support
S-Series (Campus)
TRILL No
FCoE No
DCB (Data Center Bridging) No
Virtualization awareness No
Template Based Configuration Yes
Cloud Engine - Series
TRILL Yes
FCoE Yes
DCB (Data Center Bridging) Yes
Virtualization awareness Yes
Template Based Configuration No
Supported Features on SVF
16. 17
Service Chain Orchestration
Parent Switch
AS Layer 1
AS Layer 2
1. Authentication (802.1x)
2. Communication between Orchestration Device
and Service Device (GRE Tunnel)
Orchestration device
Service device
3. Service Chain resource
4. Service flow
5. Service Chain
6. Policy on Service Device