DHCP and VRF

[vin.marco]

HI

I have a problem with C6800.

I configured the DHCP service but the vrf VRF-A command does not exist?

ip dhcp excluded-address 10.xx.xx.1
ip dhcp pool VoIP_UC14_V254
   network 10.xx.xx.0 255.255.255.0
   default-router 10.xx.xx.1 
   option 150 ip 10.xx.x.132 10.xx.x.132 
   dns-server 10.xx.xx.151 10.xx.xx.158 
!
6807_VSS(dhcp-config)#?
DHCP pool configuration commands:
  address              Configure a reserved address
  bootfile             Boot file name
  client-identifier    Client identifier
  client-name          Client name
  default-router       Default routers
  dns-server           DNS servers
  domain-name          Domain name
  exit                 Exit from DHCP pool configuration mode
  hardware-address     Client hardware address
  host                 Client IP address and mask
  import               Programatically importing DHCP option parameters
  lease                Address lease time
  netbios-name-server  NetBIOS (WINS) name servers
  netbios-node-type    NetBIOS node type
  network              Network number and mask
  next-server          Next server in boot process
  no                   Negate a command or set its defaults
  option               Raw DHCP options
  remember             Remember released bindings
  renew                Configure renewal policy
  reserved-only        Only allocate reserved addresses

6807_VSS(dhcp-config)#vrf ?
% Unrecognized command
VSS(dhcp-config)#vrf 

How is it possible ?

The 6800 has a 6T Supervisor Engine and IOS 15.5(1)SY6

[M02@rt37]

Hello @vin.marco 

ip dhcp using vrf is not supported on IOS versions for the 6500 or 6800 series.

[vin.marco]

So it's not possible to make DHCP work in VRF on the 6800?

[balaji.bandi]

Not that we aware that was working on IOS 15.X code.

[MHM Cisco World]

Hmm' 

It dhcp pool vrf aware only work for router it so limited in SW.

Now we have issue 

Let me try something in lab 

Maybe it works.

If it work I will send you solution.

MHM

[MHM Cisco World]

Hi again'

I check my note

Are relay use 

Ip dhcp relay option vpn-id 

In global mode ?

If not then why you need vrf aware dhcp pool?

MHM

[vin.marco]

I wanted to update you, even without the vrf XXX command the server releases IP addresses.

I don't know why but it works

[M02@rt37]

Thanks for your feedback @vin.marco 

[MHM Cisco World]

We use vrf under dhcp only for mpls and we make dhcp relay push vpn id' here you dont need it you dont have mpls and the dhcp subnet is reachable via server  (I think via leaking route).

So that why I ask do you use vpn-id dhcp relay.

It will work no problem.

MHM