10-31-2007 03:49 AM - edited 03-03-2019 05:35 AM
Hi,
We have a problem using an NM-16ESW in a 2811 routeur. Actually this network module works perfectly in routing mode (no switchport on the interfaces) but we are not able to use it in switching mode; Our configuration is very simple: We have configured vlan 100 in vlan database, we have configured interface vlan 100 and set an ip address to this interface vlan 100, then we have put the interface Fa1/0 (first int of the NM-16ESW) in vlan 100 (switchport mode acces, switchport access vlan 100). But there is nothing to do and we are still unable to ping (of course we've checked that interfaces are up)!!! Thanks for your help because this problem is going to drive us crazy !
Regards,
Adrien
Pau, FRANCE
Solved! Go to Solution.
10-31-2007 09:01 AM
Hello,
It looks like you have a 4port HWIC also in the router. You may want to remove it and retest. I remember trying to use a 9 port HWIC with a 36 port ESW in a 2851 and they could not communicate with each other. However now I just have the 36port ESW in several 2851's and they work fine with basically what you have configured.
10-31-2007 05:03 AM
Maybe you can post the config and elaborate a little more on how you are testing this and what is on the port that you are trying to ping , is a pc or a switch etc... Sounds like you have the config down.
You need at least 1 active interface in vlan 100 to be able to ping the SVI address . Use the "show vlan-switch" command to verify vlan was created and your port shows in the right vlan.
vlan database
vlan 100
exit
int vlan 100
ip addres xxx.xxx.xxx.xxx
int f1/0
switchport
switchport mode access
switchport access vlan 100
10-31-2007 07:13 AM
Hi !
Thanks for your response. We entered the same commands as you to create vlan and to configure interface vlan.
As requested, here is output of "sh run" command related to the NM-16ESW configuration. As you can see configuration is very simple.
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0/0
switchport access vlan 100
!
interface FastEthernet0/0/1
switchport access vlan 100
!
interface FastEthernet0/0/2
!
interface FastEthernet0/0/3
!
interface FastEthernet1/0
switchport access vlan 100
!
interface FastEthernet1/1
description *** Sectorielle 1 ***
switchport access vlan 100
!
interface FastEthernet1/2
description *** Sectorielle 2 ***
switchport access vlan 100
!
interface FastEthernet1/3
description *** Sectorielle 3 ***
switchport access vlan 100
!
interface FastEthernet1/4
description *** Sectorielle 4 ***
switchport access vlan 100
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
!
interface FastEthernet1/15
!
interface Vlan1
no ip address
shutdown
!
interface Vlan100
ip address 192.168.38.252 255.255.255.0
standby 100 ip 192.168.38.254
standby 100 priority 110
standby 100 preempt
!
....
Here is output of show command in the vlan database... as you can see we are able to see VLAN 100 which has been created with "vlan 100" command in vlan database mode.
Router(vlan)#sh
VLAN ISL Id: 1
Name: default
Media Type: Ethernet
VLAN 802.10 Id: 100001
State: Operational
MTU: 1500
Translational Bridged VLAN: 1002
Translational Bridged VLAN: 1003
VLAN ISL Id: 100
Name: VLAN0100
Media Type: Ethernet
VLAN 802.10 Id: 100100
State: Operational
MTU: 1500
.....
It seems to be very simple but unable to ping anything. We tried to connect a pc, a routeur on interfaces within vlan 100 (Fa1/0 - 4), configured of course with an ip address within the subnet 192.168.38.0/24, but it doesn't work-> impossible to ping. Worst; when we connect a router we are able to see it with sh cdp nei command (but ping doesn't work)!
Thanks for your help.
10-31-2007 09:01 AM
Hello,
It looks like you have a 4port HWIC also in the router. You may want to remove it and retest. I remember trying to use a 9 port HWIC with a 36 port ESW in a 2851 and they could not communicate with each other. However now I just have the 36port ESW in several 2851's and they work fine with basically what you have configured.
10-31-2007 09:08 AM
Ethernet Switch Network Modules
This chapter explains how to install the 16- and 36-port Ethernet switch network modules. The Ethernet switch network module is a modular, high-density voice network module that provides Layer 2 switching across Ethernet ports. The 16-port Ethernet switch network module has 16 10/100BASE-TX ports and an optional 10/100/1000BASE-T Gigabit Ethernet port. The 36-port Ethernet switch network module has 36 10/100BASE-TX ports and 2 optional 10/100/1000BASE-T Gigabit Ethernet ports. The 36-port Ethernet switch network module requires a double-wide slot. An optional power module can also be added to provide inline power for IP telephones.
The10/100BASE-TX ports and Gigabit Ethernet ports on the Ethernet switch network module are connected to the network using RJ-45 connectors on the front panel. The power module is connected to an external power supply using a power connection cable. The front of the 16-port card is shown in Figure 17-1. The front panel of the 36-port card is shown in Figure 17-2.
Figure 17-1 16-Port Ethernet Switch Network Module
Figure 17-2 36-Port Ethernet Switch Network Module
Requirements for Installing Two Ethernet Switch Network Modules in a Single Chassis
A maximum of two Ethernet switch network modules can be installed in a single chassis. If two Ethernet switch network modules of any type are installed in the same chassis, the following configuration requirements must be met:
â¢Both Ethernet switch network modules must have an optional Gigabit Ethernet expansion board installed.
â¢An Ethernet crossover cable is connected to the two Ethernet switch network modules using the optional Gigabit Ethernet expansion board ports.
â¢Intrachassis stacking for the the optional Gigabit Ethernet expansion board ports is configured. For information about intrachassis stacking configuration, see the 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 series feature document.
Without this configuration and connection, duplications will occur in the VLAN databases, and unexpected packet handling may occur.
10-31-2007 01:14 PM
Thanks for your reponse ! You're right ! As soon as we remove the 4port HWIC, the NM-16ESW works perfectly. It seems to be a kind of conflict between these two cards... Moreover some others stranges Layer3 behaviours can be observed when these two cards are installed within the 2811:
- OSPF adjacencies never reach FULL state.
- ODR routing doesn't work too...
Don't check if it's a well known bug but hope Cisco will correct it soon.
Thanks again for your help.
Regards,
Adrien
01-16-2008 08:09 AM
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