09-24-2008 02:14 AM - edited 03-06-2019 01:33 AM
hi
i have cisco 3750 with 2 VLAN's. Vlan1 (192.168.15.252/255.255.240.0)
and vlan10(10.0.0.1 255.255.0.0).when i ping from client PC(10.0.0.52/255.255.0.0) to
Vlan1 interface is working.but i am not able to ping the default gateway(it is configured
in cisco 3750 switch).
Please help me resolve this
09-24-2008 02:48 AM
There is insufficient information here to help resolve your issue.
What is the default gateway you are pinging, where does this sit in relation to the client. DO you hve routing running on your 3750?
Steve
09-24-2008 02:54 AM
my config
sh run
Building configuration...
Current configuration : 2069 bytes
!
! Last configuration change at 15:29:57 UTC Wed Sep 24 2008
! NVRAM config last updated at 15:30:08 UTC Wed Sep 24 2008
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname WS3750
!
enable secret 5 $1$PTwR$kLMakrcL7.5rE0klpHqe2/
!
no aaa new-model
clock timezone UTC 5 30
switch 1 provision ws-c3750g-24t
system mtu routing 1500
vtp domain cisco
vtp mode transparent
ip subnet-zero
ip routing
ip dhcp excluded-address 10.0.0.1 10.0.0.50
!
ip dhcp pool wifiusers
network 10.0.0.0 255.255.0.0
domain-name **************
dns-server 218.248.240.24 218.248.240.23
default-router 10.0.0.1
lease 30
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan 10
name wifi
!
!
interface GigabitEthernet1/0/1
description collegeproxy
!
interface GigabitEthernet1/0/2
!
interface GigabitEthernet1/0/3
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface GigabitEthernet1/0/13
!
interface GigabitEthernet1/0/14
!
interface GigabitEthernet1/0/15
!
interface GigabitEthernet1/0/16
!
interface GigabitEthernet1/0/17
!
interface GigabitEthernet1/0/18
!
interface GigabitEthernet1/0/19
!
interface GigabitEthernet1/0/20
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
!
interface GigabitEthernet1/0/23
switchport access vlan 10
switchport mode access
!
interface GigabitEthernet1/0/24
!
interface Vlan1
ip address 192.168.15.253 255.255.240.0
!
interface Vlan10
ip address 10.0.0.1 255.255.0.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.1
ip http server
!
!
!
control-plane
!
!
line con 0
logging synchronous
line vty 0 4
login
length 0
line vty 5 15
password *********
login
length 0
!
end
WS3750#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.0.1 to network 0.0.0.0
10.0.0.0/16 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Vlan10
S* 0.0.0.0/0 [1/0] via 192.168.0.1
C 192.168.0.0/20 is directly connected, Vlan1
WS3750#ping 10.0.0.52
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.52, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
WS3750#ping 192.168.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms
WS3750#ping 192.168.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms
WS3750#
09-24-2008 04:04 AM
mohana
Thank you for providing the additional information. The config does not have any obvious errors. The ping output that you posted shows that there is access to the default gateway of 192.168.0.1. When you do the standard ping, as in your post, the switch will use as the source address the address of the outbound interface (in your case the address of vlan 1). I would suggest that you do an extended ping from the switch. In the extended ping specify the same destination of 192.168.0.1 but also specify that the source address is from vlan 10 (10.0.0.1). I suspect that the extended ping will fail. If it does fail it will demonstrate that the problem is not on this switch but the problem is that the gateway at 192.168.0.1 does not have a route for the 10.0.0.0/16 network pointing back to this switch.
HTH
Rick
09-24-2008 04:15 AM
i agree with rick check the gateway dose it have route to 10.0.0.0/16 through vlan 10 interface
if the router use static route should have somthing like
ip route 10.0.0.0 255.255.0.0 [vlan10 IP]
good luck
09-24-2008 04:28 AM
hi all
thanks for the reply
my router ( 192.168.0.1 ) is linux proxy server.how to add route static in linux server
regs
S.Mohana sundaram
09-24-2008 04:30 AM
i have no idea but i now mostly the problem is there
good luck
09-24-2008 05:37 AM
hi
i have add route manualy in gw 192.168.0.1.now its pinging.but i am unable to browse internet.
thanks in advance
regs
S.Mohana sundaram
09-24-2008 07:25 AM
mohana
I am glad that our suggestions helped you to resolve your problem with pinging the gateway. You have not provided much for us to work with for this new problem. Based on what you have told us so far I would guess that the problem was that there is not address translation for the traffic from the switch going out to the Internet. Can you check and tell us whether there is translation for these addresses?
HTH
Rick
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