ip route vrf MYVRF

[josebash]

Hello,

I am having some problems with Spectrum and DHCP.

I have this Cisco Asr1001.

I have  a few VRFs

My problem is that Spectrums changes its gateway every few months, and I must manually put it into my router.

#this doesn't work

ip route vrf MYVRF 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 DHCP

becomes this in the sh run =>   ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 DHCP

#This works

ip route vrf MYVRF 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 76.82.101.1

#

interface GigabitEthernet0/0/0
description TO-ISP
ip vrf forwarding ISP
ip address dhcp
ip mtu 1472
ip nat outside
ip tcp adjust-mss 1360
negotiation auto

#

How can I use "ip route vrf to get the default gateway from Spectrum DHCP?

I can't find the answer online. Can someone help me out, please?

Thanks in advance.

[balaji.bandi]

#This works

ip route vrf MYVRF 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 76.82.101.1

when the DHCP IP get you will know the DHCP gateway also ? if so you can run EEM Script when the IP changed

remove the Route and add route with new IP ? (is this something works for you - that is only thing i can think of ?)

[MHM Cisco World]

Two things 

1-it is bug

Or

2-the server send default route and your router add it in global, to check this point run debug ip routing and see when the route is add.

MHM

[MHM Cisco World]

if the server send this default route you can make Router not ask Op121 from the server 
MHM

[r.heitmann]

well, I can't explain why, but In my lab it's working in my day by day setup well using this configuration:

* without "vrf"-option at the "ip route" command

interface GigabitEthernet1
vrf forwarding INTERNET
ip address dhcp
ip nat outside
negotiation auto
!
ip route 0.0.0.0 0.0.0.0 GigabitEthernet1 dhcp

Looking at the routing-table:

* "distance" = 254 means by DHCP (normal static routes would have distance=1)

#show ip route vrf INTERNET 0.0.0.0

Routing Table: INTERNET
Routing entry for 0.0.0.0/0, supernet
Known via "static", distance 254, metric 0, candidate default path
Routing Descriptor Blocks:
* 192.168.22.1
Route metric is 0, traffic share count is 1

R1C-A#show dhcp lease
Temp IP addr: 192.168.22.112 for peer on Interface: GigabitEthernet1
Temp sub net mask: 255.255.255.0
DHCP Lease server: 192.168.22.1, state: 5 Bound
DHCP transaction id: 1CA1
Lease: 72000 secs, Renewal: 36000 secs, Rebind: 63000 secs
Temp default-gateway addr: 192.168.22.1
Next timer fires after: 00:35:59
Retry count: 0 Client-ID: cisco-0050.56c9.6ca9-Gi1
Client-ID hex dump: 636973636F2D303035302E353662392E
Hostname: R1C-A