11-13-2006 06:34 AM - edited 03-05-2019 12:46 PM
3745 Running 12.3(14)T7. I have a NM-ESW-16 (16-Port FE Network Module w/ Inline Power). I created a VLAN interface, DHCP Scope. Connected clients show up in the DHCP lease table, but clients do not get an address, the client ARP table shows an all-zeros MAC address for the routers VLAN interface. I do not want to enable the 3745 FE0/1 or 0/0 interface as this will be a stand-alone network. Anyhow, I had this working on a previos IOS release with another config. I must be missing something as the connected clients cannot ping the VLAN interface - even with a static address. Here's a snippet of the config ... the Unity Express NM interface config is related as it's tied to the VLAN interface:
ip dhcp excluded-address 10.1.10.1 10.1.10.10
ip dhcp pool VOICE
network 10.1.10.0 255.255.255.0
default-router 10.1.10.1
option 150 ip 10.1.10.1
interface FastEthernet3/0 (0 through 15 all the same)
switchport access vlan 100
spanning-tree portfast
interface Vlan1
no ip address
!
interface Vlan100
ip address 10.1.10.1 255.255.255.0
interface Service-Engine2/0
ip unnumbered Vlan100
service-module ip address 10.1.10.2 255.255.255.0
service-module ip default-gateway 10.1.10.1
ip classless
ip route 10.1.10.2 255.255.255.255 Service-Engine2/0
11-13-2006 07:03 AM
Did you actually create vlan 100 in the vlan database ? Won't work unless you do .
conf t
vlan database
vlan 100
exit
11-13-2006 08:11 AM
Sorry - yes, I did.
VLAN ISL Id: 100
Name: VOICE
Media Type: Ethernet
VLAN 802.10 Id: 100100
State: Operational
MTU: 1500
11-13-2006 09:23 AM
What does " show interface vlan 100 " tells you.
Also " show vlan "
-amit singh
11-13-2006 09:36 AM
Router#show interface vlan 100
Vlan100 is up, line protocol is up
Hardware is EtherSVI, address is 000d.ede3.d670 (bia 000d.ede3.d670)
Internet address is 10.1.10.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 1000000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:19, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 306
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
324 packets input, 112710 bytes, 0 no buffer
Received 324 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 packets output, 0 bytes, 0 underruns
0 output errors, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
Router#
"Show VLAN" isn't valid, though here's the "VLAN DATABASE - SHOW CURRENT" for VLAN 100
VLAN ISL Id: 100
Name: VOICE
Media Type: Ethernet
VLAN 802.10 Id: 100100
State: Operational
MTU: 1500
11-13-2006 09:44 AM
Why you have given, ip unnumbered under the serice-engine interface when you already have an IP assign to it. Could you try taking this command out of that interface, just for testing purpose and see if that works.
Let us know. Also try to paste the whole router confoguration.
-amit singh
11-13-2006 10:29 AM
Amit,
Thanks. Actually I did remove the Service Engine to make sure it wasn't affecting anything.
I erased the config and started over ... here's the new basic config:
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
no logging buffered
!
no aaa new-model
!
resource policy
!
no network-clock-participate slot 1
no network-clock-participate wic 1
ip subnet-zero
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 10.1.10.1 10.1.10.10
!
ip dhcp pool VOICE
network 10.1.10.0 255.255.255.0
option 150 ip 10.1.10.1
!
!
no ftp-server write-enable
voice-card 1
no dspfarm
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
controller T1 0/0
framing sf
linecode ami
!
!
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet3/0
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/1
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/2
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/3
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/4
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/5
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/6
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/7
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/8
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/9
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/10
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/11
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/12
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/13
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/14
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet3/15
switchport access vlan 100
spanning-tree portfast
!
interface FastEthernet4/0
!
interface FastEthernet4/1
!
interface FastEthernet4/2
!
interface FastEthernet4/3
!
interface FastEthernet4/4
!
interface FastEthernet4/5
!
interface FastEthernet4/6
!
interface FastEthernet4/7
!
interface FastEthernet4/8
!
interface FastEthernet4/9
!
interface FastEthernet4/10
!
interface FastEthernet4/11
!
interface FastEthernet4/12
!
interface FastEthernet4/13
!
interface FastEthernet4/14
!
interface FastEthernet4/15
!
interface Vlan1
no ip address
shutdown
!
interface Vlan100
ip address 10.1.10.1 255.255.255.0
!
ip classless
!
ip http server
!
!
!
!
control-plane
!
!
!
voice-port 1/0/0
!
voice-port 1/0/1
!
voice-port 1/1/0
!
voice-port 1/1/1
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
Thanks!
11-13-2006 11:17 AM
Might try doing a debug dhcp and see if that sheds any light on what may be going on .
11-14-2006 05:20 AM
Problem solved; I had added a second NM-ESW-16 around the time of my upgrade (and when the issue started). Turns out dual NM-ESW-16 modules without the use of the external GB link cable causes a corruption in the VLAN routing (a bug of sorts), according to TAC. I removed the second NM-ESW-16 and all worked fine. Thanks all...
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