ISR Vlan Interface IP Address assigned by DHCP (Client)

[judu]

I am using a Cisco C1111 ISR w/ 2 L3 interfaces, 8 L2 interfaces. 

Interface Vlan601 currently has an IP address assigned to it. I would like to use DHCP to assign the IP address to this interface. However, when I change it to DHCP, the MAC address in the DHCP request is 0000.0000.0000 which is causing the DHCP request to fail. 

Starting Point:

Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/1/0   unassigned      YES unset  up                    up      
Vlan601                192.168.1.50    YES NVRAM  up                    up     

interface GigabitEthernet0/1/0
 switchport access vlan 601
 switchport mode access

interface Vlan601
 description PartnerNet1
 ip vrf forwarding PARTNER-NET-1
 ip address 192.168.1.50 255.255.255.0
 ip nat outside

router#ping vrf PARTNER-NET-1 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms

router#show int Gi0/1/0
GigabitEthernet0/1/0 is up, line protocol is up (connected) 
  Hardware is C1111-ES-8, address is 5c64.f184.b088 (bia 5c64.f184.b088)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported 
  Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported 
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:36, output 00:00:13, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 1000 bits/sec, 2 packets/sec
  5 minute output rate 1000 bits/sec, 2 packets/sec
     950 packets input, 76619 bytes, 0 no buffer
     Received 24 broadcasts (11 multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 11 multicast, 0 pause input
     0 input packets with dribble condition detected
     933 packets output, 79668 bytes, 0 underruns
     Output 2 broadcasts (18 multicasts)
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

router#show ip int Vlan601
Vlan601 is up, line protocol is up
  Internet address is 192.168.1.50/24
  Broadcast address is 255.255.255.255
  Address determined by non-volatile memory
  MTU is 1500 bytes
  Helper address is not set
  Directed broadcast forwarding is disabled
  Outgoing Common access list is not set 
  Outgoing access list is not set
  Inbound Common access list is not set 
  Inbound  access list is not set
  Proxy ARP is enabled
  Local Proxy ARP is disabled
  Security level is default
  Split horizon is enabled
  ICMP redirects are always sent
  ICMP unreachables are always sent
  ICMP mask replies are never sent
  IP fast switching is enabled
  IP Flow switching is disabled
  IP CEF switching is enabled
  IP CEF switching turbo vector
  IP Null turbo vector
  VPN Routing/Forwarding "PARTNER-NET-1"
  Associated unicast routing topologies:
        Topology "base", operation state is UP
  IP multicast fast switching is enabled
  IP multicast distributed fast switching is disabled
  IP route-cache flags are Fast, CEF
  Router Discovery is disabled
  IP output packet accounting is disabled
  IP access violation accounting is disabled
  TCP/IP header compression is disabled
  RTP/IP header compression is disabled
  Probe proxy name replies are disabled
  Policy routing is disabled
  Network address translation is enabled, interface in domain outside
  BGP Policy Mapping is disabled
  Input features: Virtual Fragment Reassembly, NAT Outside, MCI Check
  Output features: Post-routing NAT Outside
  IPv4 WCCP Redirect outbound is disabled
  IPv4 WCCP Redirect inbound is disabled
  IPv4 WCCP Redirect exclude is disabled
  IP Clear Dont Fragment is disabled

I remove the IP address from the Vlan601 interface. 

router(config)#int Vlan601
router(config-if)#no ip address

router#show ip int br
Interface              IP-Address      OK? Method Status                Protocol  
GigabitEthernet0/1/0   unassigned      YES unset  up                    up      
Vlan601                unassigned      YES manual up                    up     

I then set the IP address to DHCP. I have tried this as just "ip address dhcp" and with the client-id set to the physical interface, and with a hostname set. Showing the last iteration. There are not many options available here. 

interface Vlan601
 description PartnerNet1
 ip vrf forwarding PARTNER-NET-1
 ip address dhcp client-id GigabitEthernet0/1/0 hostname Cisco
 ip nat outside
end

router#show ip int br
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/1/0   unassigned      YES unset  up                    up      
Vlan601                unassigned      YES DHCP   up                    up      

router(config-if)#ip address dhcp ?
  client-id  Specify client-id to use
  hostname   Specify value for hostname option
  <cr>       <cr>

router(config-if)#ip address dhcp client-id ?
  BD-VIF           Bridge-Domain Virtual IP interface
  BDI              Bridge-Domain interface
  GigabitEthernet  GigabitEthernet IEEE 802.3z
  Port-channel     Ethernet Channel of interfaces
  Vlan             Catalyst Vlans

router(config-if)#ip address dhcp client-id GigabitEthernet 0/1/0 ?
  hostname  Specify value for hostname option
  <cr>      <cr>

But the ip dhcp debug shows the MAC address being set as all zeros. 

Sep  8 17:15:15.174: DHCP: Try 3 to acquire address for Vlan601
Sep  8 17:15:15.177: DHCP: allocate request
Sep  8 17:15:15.177: DHCP: zapping entry in DHC_PURGING state for Vl601
Sep  8 17:15:15.177: DHCP: deleting entry FFFF56A0D0F8 0.0.0.0 from list
Sep  8 17:15:15.177: DHCP: new entry. add to queue, interface Vlan601
Sep  8 17:15:15.177: DHCP: MAC address specified as  0000.0000.0000 (0 0). Xid is 10A945FE
Sep  8 17:15:15.177: DHCP: SDiscover attempt # 1 for entry:
Sep  8 17:15:15.178: DHCP: Scan: Option vendor class Identifier 124
Sep  8 17:15:15.178: Enterprise ID 9
Sep  8 17:15:15.178: vendor-class-data-len 13
Sep  8 17:15:15.178: data: C1111-8PLTEEA
Sep  8 17:15:15.178: DHCP: SDiscover: sending 305 byte length DHCP packet
Sep  8 17:15:15.178: DHCP: SDiscover 305 bytes 
Sep  8 17:15:15.178:             B'cast on Vlan601 interface from 0.0.0.0
Sep  8 17:15:18.200: DHCP: SDiscover attempt # 2 for entry:
Sep  8 17:15:18.200: DHCP: Scan: Option vendor class Identifier 124
Sep  8 17:15:18.200: Enterprise ID 9
Sep  8 17:15:18.200: vendor-class-data-len 13
Sep  8 17:15:18.201: data: C1111-8PLTEEA
Sep  8 17:15:18.201: DHCP: SDiscover: sending 305 byte length DHCP packet
Sep  8 17:15:18.201: DHCP: SDiscover 305 bytes 
Sep  8 17:15:18.201:             B'cast on Vlan601 interface from 0.0.0.0
Sep  8 17:15:22.202: DHCP: SDiscover attempt # 3 for entry:
Sep  8 17:15:22.202: DHCP: Scan: Option vendor class Identifier 124
Sep  8 17:15:22.202: Enterprise ID 9
Sep  8 17:15:22.202: vendor-class-data-len 13
Sep  8 17:15:22.202: data: C1111-8PLTEEA
Sep  8 17:15:22.202: DHCP: SDiscover: sending 305 byte length DHCP packet
Sep  8 17:15:22.202: DHCP: SDiscover 305 bytes 
Sep  8 17:15:22.202:             B'cast on Vlan601 interface from 0.0.0.0
%Unknown DHCP problem.. No allocation possible
Sep  8 17:15:35.657: DHCP: Waiting for 15 seconds on interface Vlan601

How can I set the MAC address to use the MAC address of the Gi0/1/0 or some other viable solution?

[marce1000]

 -  You must assign a mac address manually to vlan 601 interface if you want it to acquire an address through dhcp as in :
                                 interface vlan601
                                      ip address dhcp
                                           mac-address <xx:xx:xx:xx:xx:xx>

 M.

[90-Lowrider]

How do you determine what MAC address to assign?

[MHM Cisco World]

For mac 000000 this normal' but are the server direct connect to any port assign to same vlan or to different vlan?

MHM

[balaji.bandi]

Where is the DHCP Server Located.

Does your VLAN 601 Layer3 aware how to reach DHCP Server ?

Can you post other end DHCP Side configuration and VLAN 601 - Make sure VLAN 601 have helper configuration for the device to get IP address from DHCP Server.

Since you configured static IP you able to reach Gateway, does that not prove that you have reachability to DHCP Server.

[90-Lowrider]

Sorry, I am not the original person who started the thread.  I have a C1111-8PWA-WS that I am setting up for the first time.  I cannot get the system to assign IP addresses and noticed this person had the same issue.

I am using VLAN1 which I associated with the WEBUIPool I set up to access the GUI  192.168.1.0
If I assign an ip address in the pool I receive the error message that the IP address is already assigned.  I've been struggling to find out how to assign an IP address to the VLAN that will correct the problem.  Marce100 said to assign a MAC address instead so I asked which MAC address.  I think he said to use 000000 but I am not sure what that means.  I can post my configuration and the error log if that is helpful.

Thank you all for your help

[balaji.bandi]

apologies i have replied to the OP -

if you have access to cli, post show run here (we can look that issue)

If I assign an ip address in the pool I receive the error message that the IP address is already assigned

what IP address assigned ?

[90-Lowrider]

Please see attached. I tried to include the error log but the file is .log which is not an acceptable file type for this forum

[Richard Burts]

Thanks for posting the running config. I see in it that you have configured a DHCP pool for 192.168.1.0/24. And I see that you have configured interface G0/0/1 with IP 192.168.1.1. So what IP address do you intend to use for vlan 1? Vlan 1 can not use 192.168.1.x because that subnet is already associated with a layer 3 interface on the device. So vlan 1 needs some other subnet.

[90-Lowrider]

Thanks Rick.  That is what I don't understand.  Am I supposed to assign an IP address to VLAN1?  If so, what address do I use?  I tried several but none worked

If you look above, Marce1000 suggested I assign a MAC address to VLAN1.  If that is the case I would need to know what MAC address to assign.  I don't know how to choose 1

[Richard Burts]

We do not have enough information about your environment to be able to give good advice. Can you tell us how you want your device to work?

Your running config suggests that you have a physical interface for outside, a physical interface for inside, and vlan 1. Your inside physical interface and vlan 1 can not use the same IP network/subnet. So what IP network/subnet would you want to be on vlan 1? And is there some reason why you want your vlan 1 to learn its address using DHCP? It would be much more simple to have a separate network/subnet for vlan 1 and to configure an address on vlan 1 for that address/subnet rather than using DHCP.

[90-Lowrider]

Let me start from scratch.  I have a C1111-8PWA-WS that will be replacing an ASUS router I currently use.  I have an SG350-28P switch and 2 APs (9120 and 9115).  All I want to do is connect my hardwire devices to either one of the 8 ports on the back of the router or one of the 28 ports on the switch.  The AP's have to be connected to the switch in order to utilize POE.

If you have a configuration you can suggest I am all ears.

I followed the instructions to access the unit with a PC via the Web GUI which is what I have been using in addition to a Microsoft Surface connected via console cable into the console port using Putty.

[Richard Burts]

Thanks for the additional information. First let me say that I have little experience with this particular platform. But the show run that you posted is pretty clear about some things. There are 2 Layer 3 ports (G0/0/0 and G0/0/1). These ports are to be configured with IP addresses (assuming that you want to use both of them). You certainly want the first of those ports to connect to outside. I am not sure that there is much need for an address on the second port, given what you describe of your environment. There are also a group of layer 2 ports (G0/1/0, G0/1/1, G0/1/2 etc). These ports are not configured with IP addresses. They belong to (by default) vlan 1. So you would connect your SG350, APs, etc to the layer 2 ports. The vlan 1 interface is the layer 3 interface for that vlan. I see no reason why you would want to use DHCP to assign that address.

[90-Lowrider]

All correct.  g0/0/0 is used to connect to the modem.  g0/0/1 is assigned the ip address 192.168.1.1 and is where I plug in a computer to access the GUI.

"see no reason why you would want to use DHCP to assign that address" did you mean use DHCP to assign the address of VLAN1?

I do use DHCP to assign ip addresses in the pool WEBUIPool which is associated with VLAN1.  The GUI allows me to use static or DHCP to assign an ip address to VLAN1.  I've tried both with no luck 

[90-Lowrider]

" The vlan 1 interface is the layer 3 interface for that vlan"

Do VLANs sit at layer 3 or layer 2?