06-12-2008 03:10 AM - edited 03-05-2019 11:34 PM
Hi There,
Below is the configuration of the switch which is having problem. Summary of the problem is when I add host on Vlan210 I am not able to ping that host and if I execute is sh ip arp is it show "incomplete" status. Please help me out to solve this problem. For your better understand here I have copied the configuration and IOS version also. The hosts which is having problem is Linux and server is DELL 2950 and DELL R900
ip subnet-zero
ip routing
spanning-tree mode rapid-pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
spanning-tree vlan 153-255 priority 28672
interface GigabitEthernet1/0/1
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/2
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/3
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/6
switchport access vlan 254
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/7
switchport access vlan 254
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/10
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/11
switchport access vlan 254
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/12
switchport access vlan 254
switchport mode access
spanning-tree portfast
interface GigabitEthernet1/0/16
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/17
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/18
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/19
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/20
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/21
switchport access vlan 210
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/24
switchport access vlan 255
switchport mode access
spanning-tree portfast
interface Vlan152
ip address 192.168.174.114 255.255.255.252
!
interface Vlan210
description Management
ip address 10.3.210.1 255.255.255.0
no ip redirects
no ip unreachables
!
interface Vlan254
ip address 10.3.254.1 255.255.255.0
!
interface Vlan255
ip address 10.3.255.66 255.255.255.224
!
router rip
version 2
redistribute static
network 10.0.0.0
no auto-summary
!
ip default-gateway 10.3.210.2
ip classless
ip route 0.0.0.0 0.0.0.0 10.3.210.2
sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.3.210.155 153 0015.c5eb.d835 ARPA Vlan210
Internet 10.3.254.182 93 001e.c9ce.3e80 ARPA Vlan254
Internet 10.3.210.182 0 Incomplete ARPA
Internet 10.3.255.69 0 0060.fb50.81fd ARPA Vlan255
Internet 10.3.255.66 - 0016.46cd.1244 ARPA Vlan255
Internet 10.3.255.65 0 001d.e622.5140 ARPA Vlan255
Internet 10.3.210.8 7 0017.5ab5.3daa ARPA Vlan210
Internet 10.3.210.3 156 00a0.8ea7.3b50 ARPA Vlan210
Internet 10.3.210.2 0 0000.5e00.0101 ARPA Vlan210
Internet 10.3.210.1 - 0016.46cd.1242 ARPA Vlan210
Internet 10.3.210.7 7 0060.161e.0182 ARPA Vlan210
Internet 10.3.210.6 0 0060.161e.0348 ARPA Vlan210
Internet 10.3.210.4 0 00a0.8ea7.3d70 ARPA Vlan210
Internet 192.168.174.114 - 0016.46cd.1241 ARPA Vlan152
Internet 192.168.174.113 156 0009.b68c.fd30 ARPA Vlan152
Internet 10.3.254.1 - 0016.46cd.1243 ARPA Vlan254
06-12-2008 03:26 AM
sivakumar
The information that you provide here is a good start but is not enough for us to find the problem. You talk about a host and 2 servers. Are they all having this problem or just the host?
Can you tell us which port of the switch connects to what device that is having the problem?
And can you verify (probably using ipconfig) what is the IP address, subnet mask, and default gateway configured on the device that is having the problem?
If we know these things we may be able to help you solve this issue.
HTH
Rick
06-12-2008 03:36 AM
Make sure you have the correct default gateway on the server nics, for 210 it should be 10.3.210.1 . Also check to make sure the L2 vlan is created and active with the show vlan command.
06-12-2008 03:48 AM
Thanks for your reply. L2 Vlan is active and few IP's communicating without any issue. I am trying assign vlan 210 to two DELL server which has linux OS and it is not working. All the Vlan shown in the config are active and pingable.
06-12-2008 03:53 AM
So you have 2 separate DELL servers each running linux ?
As Glen says could you check the IP address/subnet mask/default-gateway on your linux servers ie.
ifconfig -a
will show NIC details
netstat -nr
will show the routing tables.
Also depending on your linux version it may well be running a firewall. If it is it could well be iptables so
iptables -L -n
this will show you if any firewall rules are preventing the ping.
Best to run all the above commands as root.
Jon
06-12-2008 04:06 AM
Yes I have checked everything. One of the host is Checkpoint R65 smartcentre server also. At the same time DELL Remote access card(DRAC)don't have any issue and the VLAN 254 is DRAC. The gateway 10.3.210.2 is checkpoint Firewall. I have update IOS recently two weeks ago and Smartcentre was working well with the IP address 10.3.210.5. But after rebooting it didn't communicate. I thought problem with like you , but second server which I rack mounted and booted first time today also had the same issue. It was working well in the test environment.
Siva
cheers,
siva
06-12-2008 07:02 AM
siva
Based on the description of the symptoms I believe that there are several possible causes of the problem which we should consideder:
- there may be a physical problem with the connection. If you tell us what switch interface the server is connected to and show interface from the switch we will know whether the interface to the server is up or not.
- there might be a configuration error on the server about its IP address, its subnetmask, or its default gateway. A configuration error here might prevent it from responding to the ARP request and produce the incomplete ARP which you experience. If you tell us exactly how the server is configured we will know whether this is the problem.
- the server might be on a port not assigned to the correct VLAN. The server might have the correct address but if its port is in a different VLAN than expected then it will not respond to the ARP request and this will produce the incomplete ARP.
Can you tell us these things so that we will know whether one of these is the problem?
HTH
Rick
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