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公告

December 2020

December 2020

【原创】Cisco Vitrual Device Context

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VDC Properties

 

Each VDC is treated as standalone device with limited resources

 

Each VDC will have MAC address assigned to it which uniquely

identifies a VDC in a network

 

VDC 1 (DEFAULT_VDC) is the “Default Virtual Device Context”.

Ports in system exists in VDC 1 (DEFAULT_VDC) when they are not

assigned to any other VDC

 

User cannot create/delete default virtual device context

 

VDC defines the “Software Fault Domain” within a physical switch.

Any service crash in Virtual Device Context doesn’t affect the rest of

the Virtual Device Contexts

 

VDC can have management domain assigned to it and hence giving

control to user which has appropriate permission for VDC

 

For VDC user needs to change the mode before configuring

resources assigned to VDC

 

VDC Properties

Ports belong to only one VDC and cannot be shared

across VDCs

HW resources are shared across VDCs

>No guaranteed bandwidth on oversubscribed ports across

VDCs

No L2/L3 switching/routing across VDCs except

through external connection

 

Resource allocation for VDC

System resources are finite

Mediate hardware resources between VDCs

Centralized resources allocation

Allow user to manage resources for each VDC

Interfaces

All interfaces belongs to

default-VDC on bootup

 

Super-user can assign

interfaces to different VDCs

ƒ

Once interface is moved all

configuration is done from

within that VDC only

 

VDCs are aware of interfaces

which are assigned to it

 

Moving interfaces

config#vdc foo

config-vdc# allocate interface e2/1-8

STATUS

2

8

10

16

18

24

26

32

1

7

9

15

17

23

25

31

WS-X9032-SMV

FC Services Module

STATUS

2

8

1

7

WS-X9032-SMV

FC Services Module

ƒ

Interface move causes all

configuration to be

removed from old vdc

before moved to new

VDC

ƒ

Interface moves to new

VDC in shut state

ƒ

User needs to do

switchto before

configuring interfaces in

different VDCs

 

Configuring interfaces

switch# conf t

switch(config)# vdc foo

switch(config-vdc)# allocate interface ethernet 2/1

switch(config-vdc)# show vdc membership

vdc_id: 1 vdc_name: vdc_1 interfaces:

Ethernet2/9 Ethernet2/10 Ethernet2/11

Ethernet2/12 Ethernet2/13 Ethernet2/14

Ethernet2/15 Ethernet2/16 ….

vdc_id: 2 vdc_name: foo interfaces:

Ethernet2/1 Ethernet2/2 Ethernet2/3

Ethernet2/4 Ethernet2/5 Ethernet2/6

Ethernet2/7 Ethernet2/8

switch(config-vdc)# end

switch# switchto vdc 2

Cisco Storage Area Networking Operating System (SAN-OS) Software

TAC support: http://www.cisco.com/tac....

switch(vdc)# conf t

switch(vdc-config)# interface ethernet 2/1

switch(vdc-config-if)# switchport

switch(vdc-config-if)# switchport mode trunk

switch(vdc-config-if)# switchport trunk allowed vlan 2-100

Resource template configuration

Allow configuration based on resource requirements

switch(config)# resource template <template-name>

switch(config-res)# ?

limit-resource

Set resource limits

switch(config-res)# limit-resource ?

vlan

Set VLANs resource limits

port-channel

Set port-channel resource limits

….

switch(config-res)# limit-resource vlan min 64 max 128

switch(config-res)# limit-resource port-channel min 2 max 8

switch(config-res)# show resource template <template-name>

Vlan resources:

Mininum vlans

64

Maximum vlans

128

Port-channel resources:

Miminum port-channels

2

Maximum port-channels 8

 

VDC CLIs

switch#conf t

switch(config)# vdc ?

<CR>

<1-32> Enter Virtual Device Context <vdc-id>

name Enter Virtual Device Context <vdc-name>

resource Resource configuration

template Resource template for this vdc

switch(confg)# vdc foo

switch(confg-vdc)#

switch(config)# show vdc

switch#config t

switch(config)# vdc foo

switch(config-vdc)# allocate interface Ethernet 2/1-8

switch(config-vdc)# show vdc membership

vdc_id: 1 vdc_name: vdc_1 interfaces:

Ethernet 2/9 Ethernet 2/10 Ethernet 2/11

Ethernet 2/12 Ethernet 2/13 Ethernet 2/14

Ethernet 2/15 Ethernet 2/16 ….

vdc_id: 2 vdc_name: foo interfaces:

Ethernet 2/1 Ethernet 2/2 Ethernet 2/3

Ethernet 2/4 Ethernet 2/5 Ethernet 2/6

Ethernet 2/7 Ethernet 2/8

Virtual Device Context Verification

Several commands are available to verify VDC configurations and resource

utilization.

Verifying VDC Details:

n7000# show vdc

vdc_id vdc_name

state mac

------ --------

-----

----------

1 n7000 active 00:18:ba:d8:58:a5

2 production active 00:18:ba:d8:58:a6

3 lab active 00:18:ba:d8:58:a7

Verifying VDC Interface Membership:

n7000# show vdc membership

vdc_id: 1 vdc_name: n7000 interfaces:

Ethernet1/1 Ethernet1/2 Ethernet1/3

Ethernet1/4 Ethernet1/5 Ethernet1/6

Ethernet1/7 Ethernet1/8 Ethernet1/9

Ethernet1/10 Ethernet1/11 Ethernet1/12

Ethernet1/13 Ethernet1/14 Ethernet1/15

Ethernet1/16 Ethernet1/17 Ethernet1/18

 

Verifying VDC Resources:

 

n7000# show vdc resource

vlan

10 used 38 unused 16374 free 16336 avail 16384 total

monitor-session 0 used 0 unused 2 free 2 avail 2 total

vrf

6 used 42 unused 8186 free 8144 avail 8192 total

port-channel 0 used 0 unused 192 free 192 avail 192 total

u4route-mem 48 used 0 unused 208 free 208 avail 256 total

u6route-mem 24 used 0 unused 232 free 232 avail 256 total

 

 

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