11-08-2006 07:19 PM - edited 03-05-2019 12:42 PM
In my company, we have a Core-Layer3 switch, and configured the netwrok into some VLANs.
There is a new computer installed with 2 NICs,one ip is set to VLAN2 (192.168.1.79/24), and another is set
to VLAN100(192.168.100.79/24) and all the VLAN setting on switch is correct.
In my office ,I could ping 192.168.1.79, but i couldn't ping 192.168.100.79, but i could ping 192.168.100.9
(another computer),and on computer 192.168.100.9 I could ping 192.168.100.79...
The Trace information as following,(192.168.1.35 is core layer3 switch)
The IP of tracing computer I used to trace is 192.168.1.170 (VLAN2)
Tracing route to monitor.bbb.com [192.168.100.9]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms sha_h_td7172.bbb.com [192.168.1.35]
2 <1 ms <1 ms <1 ms monitor.bbb.com [192.168.100.9]
Trace complete.
C:\Documents and Settings\sheldonwu>tracert 192.168.100.79
Tracing route to 192.168.100.79 over a maximum of 30 hops
1 <1 ms <1 ms <1 ms sha_h_td7172.bbb.com [192.168.1.35]
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * ^C
C:\Documents and Settings\sheldonwu>
Core Layer3 Switch Routing as follwing.
C 192.168.241.0/24 is directly connected, Vlan241
C 192.168.247.0/24 is directly connected, Vlan52
C 192.168.246.0/24 is directly connected, Vlan51
C 192.168.200.0/24 is directly connected, Vlan200
C 192.168.1.0/24 is directly connected, Vlan2
C 192.168.100.0/24 is directly connected, Vlan100
S* 0.0.0.0/0 [1/0] via 192.168.1.10
C 192.168.242.0/23 is directly connected, Vlan70
C 192.168.244.0/23 is directly connected, Vlan60
And I could ping 192.168.100.79 on Core Layer3 Switch...
Could someone tell me the reason ?? ....
Solved! Go to Solution.
11-09-2006 06:25 AM
the reason you could ping 192.168.1.79 is because it is configured with a gateway.
the reson you could ping 192.168.100.79 from 192.168.100.9 is because they are on the same subnet, 100.9 doesn't need to go through a gateway to get to 100.79.
the reason you could not ping 192.168.100.79 from other vlans is because the nic with the 100.79 ip doesn't have a gateway configured.
the reason you could not configure 100.9 with a gateway is because windows doesn't allow 2 nic's with both configured with a gateway
11-08-2006 07:29 PM
You are not able to ping 192.168.100.79 from the new computer right but you are able to ping other hosts in that subnet.
Have you configured both interfaces of PC with gateways of their vlan IP.
Regards,
Suresh Jain
11-08-2006 07:54 PM
Yes, I configured, I don't konw why in the same subnet I just could ping one....
11-08-2006 08:43 PM
Is it possible for you paste the switch config.
11-08-2006 08:50 PM
Hi There,
Have you enabled the NIC Teaming on the PC ?
What happens if you disconnect the other link 192.168.1.79. Can you reach 192.168.100.79 ?
Can other PC in the same Vlan 100 ping 192.168.10.79?
Post the switch config.
-amit singh
11-09-2006 01:04 AM
If I disconnect the 192.168.1.79, I still couldn't ping the 192.168.100.79. And Vlan100's computer could ping 192.168.100.79
So ...very strange...
11-08-2006 10:10 PM
Hi
Is it a windows PC, if yes then give route print in the command prompt. Please post the output.
11-09-2006 01:00 AM
My L3 Switch configuration as following: (Part1)
SW-7F-CORE01#show run
Building configuration...
Current configuration : 7699 bytes
!
! Last configuration change at 01:43:10 UTC Thu Nov 9 2006
! NVRAM config last updated at 03:36:21 UTC Fri Oct 13 2006
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
service compress-config
!
hostname SW-7F-CORE01
!
boot-start-marker
boot-end-marker
!
enable secret xxx
!
no aaa new-model
ip subnet-zero
no ip domain-lookup
ip domain-name bbb.com
ip name-server 192.168.1.43
!
no ip dhcp snooping information option
ip dhcp-server 192.168.1.43
!
no file verify auto
!
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 2,51,70,200,241 priority 24576
spanning-tree vlan 52,60,100,500 priority 28672
power redundancy-mode redundant
!
!
!
vlan internal allocation policy ascending
!
interface Port-channel1
description Etherchannel_To_sha-6f-C4948-L3-sw02
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/3
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/4
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/5
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/6
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/7
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/8
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/9
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/10
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/11
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/12
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/13
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/14
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/15
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/16
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/17
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/18
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/19
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/20
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/21
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/22
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/23
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/24
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/25
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/26
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/27
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/28
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/29
switchport trunk encapsulation dot1q
switchport mode trunk
!
11-09-2006 01:02 AM
(Part2)
interface GigabitEthernet1/30
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/31
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/32
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/33
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/34
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/35
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/36
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/37
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/38
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/39
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/40
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/41
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/42
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/43
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface GigabitEthernet1/44
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface GigabitEthernet1/45
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/46
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/47
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/48
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
ip address 192.168.1.58 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
standby 2 ip 192.168.1.3
standby 2 priority 110
standby 2 preempt
!
interface Vlan51
ip address 192.168.246.2 255.255.255.0
ip helper-address 192.168.1.43
no ip redirects
no ip unreachables
no ip proxy-arp
standby 51 ip 192.168.246.1
standby 51 priority 110
standby 51 preempt
!
interface Vlan52
ip address 192.168.247.2 255.255.255.0
ip helper-address 192.168.1.43
no ip redirects
no ip unreachables
no ip proxy-arp
standby 52 ip 192.168.247.1
standby 52 priority 90
standby 52 preempt
!
interface Vlan60
ip address 192.168.244.2 255.255.254.0
ip helper-address 192.168.1.43
no ip redirects
no ip unreachables
no ip proxy-arp
standby 60 ip 192.168.244.1
standby 60 priority 90
standby 60 preempt
!
interface Vlan70
ip address 192.168.242.2 255.255.254.0
ip helper-address 192.168.1.43
no ip redirects
no ip unreachables
no ip proxy-arp
standby 70 ip 192.168.242.1
standby 70 priority 110
standby 70 preempt
!
interface Vlan100
ip address 192.168.100.17 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
standby 100 ip 192.168.100.1
standby 100 priority 90
standby 100 preempt
!
interface Vlan200
ip address 192.168.200.18 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
standby 200 ip 192.168.200.1
standby 200 priority 110
standby 200 preempt
!
interface Vlan241
ip address 192.168.241.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
!
ip route 0.0.0.0 0.0.0.0 192.168.1.10
ip http server
!
!
banner login ^C
^C
!
line con 0
exec-timeout 30 0
stopbits 1
line vty 0 4
exec-timeout 20 0
password 7 0832584B051504
login
line vty 5 15
exec-timeout 5 0
password 7 05080F1C2243
login
!
end
SW-7F-CORE01#
11-09-2006 01:08 AM
Ooh~ when I down the 192.168.1.79~~and another ip could be ping... Maybe it's so called teaming ...But how could I disable it?
The os I used is Debian(sarge), Thanks.
11-09-2006 01:19 AM
But when the two NICs are up ,VLAN100 could ping the 192.168.100.79..... And on this computer, I only set the gateway 192.168.100.1, configuration is following:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
localnet * 255.255.255.0 U 0 0 0 eth0
localnet * 255.255.255.0 U 0 0 0 eth2
default 192.168.100.1 0.0.0.0 UG 0 0 0 eth0
with it, I could ping other VLAN's computer.
11-09-2006 04:39 AM
Could any one help me ??
11-09-2006 06:25 AM
the reason you could ping 192.168.1.79 is because it is configured with a gateway.
the reson you could ping 192.168.100.79 from 192.168.100.9 is because they are on the same subnet, 100.9 doesn't need to go through a gateway to get to 100.79.
the reason you could not ping 192.168.100.79 from other vlans is because the nic with the 100.79 ip doesn't have a gateway configured.
the reason you could not configure 100.9 with a gateway is because windows doesn't allow 2 nic's with both configured with a gateway
11-09-2006 09:15 PM
In response to the above post, if you want the connectivity you could add a route on the machine with dual nic
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