[c-nsp] Cisco ASR 901 as a DHCP server

[Scott Miller]

What do you mean by NAT might be the problem?  I also have that
other subnet configured properly, just not included in the config I
provided.  If I can't get 1 working, no sense in troubleshooting both.  If
you might be able to elaborate a bit on your NAT suggestion, it would be
appreciated.

On Fri, May 21, 2021 at 3:15 PM Jerry Bacon <jerryb at startouch.com> wrote:

> I think the NAT might be the problem. Also you need to add the 192.168.4.1
> gateway.
>
> --
> Jerry Bacon
> StarTouch - Senior Network Engineer
> Sent from my iPhone
>
> > On May 21, 2021, at 11:30 AM, Scott Miller <fordlove at gmail.com> wrote:
> >
> > Wondering if anyone has configured a 901 as a DHCP server.  It's being
> used
> > in a multi-tenant location, other customers are static public /30 and
> work
> > fine, but we have a customer who wants us to do DHCP for them. So instead
> > of adding another box, I was trying to get the 901 to be the DHCP server.
> > For some reason, it's not working.  I have configured other routers no
> > problem as a DHCP server, this one the client gets an IP, can ping the
> > gateway, can ping the uplink IP, can ping the core, but can't leave our
> > network.  Kinda feels like a MTU issue, but all set to 9000.  Here's my
> > config:
> > Anyone ever try it, and have any suggestions?
> >
> > ASR901 - A901-12C-F-D
> > AdvancedMetroIPAccess
> > Version 15.6(2)SP3
> >
> > !
> > ip dhcp excluded-address 192.168.3.1 192.168.3.50
> > ip dhcp excluded-address 192.168.4.0 192.168.4.50
> > !
> > ip dhcp pool DATA
> > network 192.168.3.0 255.255.255.0
> > default-router 192.168.3.1
> > dns-server xx.xx.xx.xx
> > !
> > ip dhcp pool VOICE
> > network 192.168.4.0 255.255.255.0
> > dns-server xx.xx.xx.xx
> > default-router 192.168.4.1
> > !
> > interface GigabitEthernet0/0
> > description UPLINK TO CORE
> > mtu 9000
> > no ip address
> > ip nat outside
> > load-interval 30
> > negotiation auto
> > service instance 50 ethernet
> >  description PTP to CORE OSPF Area 0
> >  encapsulation untagged
> >  bridge-domain 50
> > !
> > interface Vlan50
> > description OSPF TO CORE
> > mtu 9000
> > ip address xx.xx.206.30 255.255.255.252
> > no ip redirects
> > no ip proxy-arp
> > ip nat outside
> > ip pim sparse-mode
> > ip ospf network point-to-point
> > ip ospf mtu-ignore
> > load-interval 30
> > carrier-delay msec 0
> > mpls ip
> > mpls traffic-eng tunnels
> > !
> > interface GigabitEthernet0/1
> > description Uplink to Customer XXXXXX - DHCP Inside
> > mtu 9000
> > no ip address
> > ip nat inside
> > load-interval 30
> > negotiation auto
> > service instance 100 ethernet
> >  description XXXXXXX Data Network
> >  encapsulation untagged
> >  bridge-domain 100
> > !
> > !
> > interface Vlan100
> > description XXXXXX Data Network
> > mtu 9000
> > ip address 192.168.3.1 255.255.255.0
> > no ip redirects
> > no ip proxy-arp
> > ip nat inside
> > !
> > ip nat inside source list 150 interface Vlan50 overload
> > !
> > access-list 150 remark Network Address Translation
> > access-list 150 permit ip 192.168.3.0 0.0.0.255 any
> > access-list 150 permit ip 192.168.4.0 0.0.0.255 any
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