07-09-2012 12:35 PM - edited 03-07-2019 07:40 AM
Hello people, sorry for take your time but im in the middle of DUMP problem...and I need to resolve...
I got a Cisco 3550/24ports with a simple configuration
Port Fa0/1 Configured as L3
Port Fa0/2 Standart L2 switch
My porblem is the following, I got a Host connected into Fa0/2 receiving DHCP from my Pool created on VLAN33 , but that Host do not get access to internet, even I cannot ping from the console, im connected to the 3550 remotely withour issues and I ping outside without problems....could somebody help with this?
3550_3363#sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9, Fa0/10, Fa0/11, Fa0/12, Fa0/13, Fa0/14, Fa0/15, Fa0/16
Fa0/17, Fa0/18, Fa0/19, Fa0/20, Fa0/21, Fa0/22, Fa0/23, Fa0/24, Gi0/1, Gi0/2
2 VLAN0002 active
4 VLAN0004 active
8 VLAN0008 active
33 VLAN0033 active Fa0/2
53 VLAN0053 active
3550_3363#sr
Building configuration...
Current configuration : 2655 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname 3550_3363
!
enable secret 5 $1$wJOc$eYv8.ftqldewehN8QQQKdz.er.
!
ip subnet-zero
ip routing
!
ip dhcp pool Office33
network 192.168.33.0 255.255.255.0
dns-server 8.8.8.8
default-router 192.168.33.1
!
no ip domain-lookup
mls qos
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
!
class-map match-all CATCH
!
!
interface FastEthernet0/1
no switchport
ip address 173.xxx.xxx.90 255.255.255.240
!
interface FastEthernet0/2
switchport access vlan 33
switchport mode access
!
interface FastEthernet0/3
switchport mode dynamic desirable
!
interface FastEthernet0/4
switchport mode dynamic desirable
!
interface FastEthernet0/5
switchport mode dynamic desirable
!
interface FastEthernet0/6
switchport mode dynamic desirable
!
interface FastEthernet0/7
switchport mode dynamic desirable
!
interface FastEthernet0/8
switchport mode dynamic desirable
!
interface FastEthernet0/9
switchport mode dynamic desirable
!
interface FastEthernet0/10
switchport mode dynamic desirable
!
interface FastEthernet0/11
switchport mode dynamic desirable
!
interface FastEthernet0/12
switchport mode dynamic desirable
!
interface FastEthernet0/13
switchport mode dynamic desirable
!
interface FastEthernet0/14
switchport mode dynamic desirable
!
interface FastEthernet0/15
switchport mode dynamic desirable
!
interface FastEthernet0/16
switchport mode dynamic desirable
!
interface FastEthernet0/17
switchport mode dynamic desirable
!
interface FastEthernet0/18
switchport mode dynamic desirable
!
interface FastEthernet0/19
interface FastEthernet0/20
switchport mode dynamic desirable
!
interface FastEthernet0/21
switchport mode dynamic desirable
!
interface FastEthernet0/22
switchport mode dynamic desirable
!
interface FastEthernet0/23
switchport mode dynamic desirable
!
interface FastEthernet0/24
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
switchport mode dynamic desirable
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
no ip address
!
interface Vlan2
no ip address
!
interface Vlan33
ip address 192.168.33.1 255.255.255.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 173.xxx.xxx.81
ip http server
!
snmp-server community sunny RO
snmp-server community sunny@es0 RO
alias exec s show ip int br
alias exec sr show run
alias exec c conf t
!
Routes
3550_3363#sh route
iplus3550_3363#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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 173.xxx.xxx.81 to network 0.0.0.0
173.xxx.0.0/28 is subnetted, 1 subnets
C 173.xxx.xxx.80 is directly connected, FastEthernet0/1
C 192.168.33.0/24 is directly connected, Vlan33
S* 0.0.0.0/0 [1/0] via 173.xxx.xxx.81
thank you GUYS!!!!
Solved! Go to Solution.
07-10-2012 12:42 PM
hi Hernan,
you need to configure NAT for ur network, ur ISP knows a route to the 176.x.x.90 , but probabely doesnt know a route back to 192.168.33.0
I'm sorry Cat 3550 is not capable of NAT. do u have a router in ur network? or you have to setup a PC Server to do that for u.
Hope it Helps,
Soroush.
07-09-2012 01:00 PM
Hi,
Does the host have a correct gateway (192.168.33.1)?
If yes, can the host ping 173.xxx.xxx.90?
Since you are using provate IP, what device is doing NAT?
HTH
07-09-2012 01:15 PM
The host have the gateway as 192.168.33.1, anyways I cannot ping from the console the HOST ip 192.168.33.3...I can only ping 192.168.33.1 and outside ip's...
The host do not ping the 173.xxx.xxx.90 (int fa0/1)
We receive the connection from our provider router. (but I got connectivity from outise to the 3550, even the 3550 pings outside also, the problem sounds like inside problems)
3550_3363#sh ip dhcp binding
IP address Hardware address Lease expiration Type
192.168.33.2 0100.1921.4865.c6 Mar 01 1993 07:01 PM Automatic
iplus3550_3363#ping 192.168.33.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.33.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
3550_3363#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/17/20 ms
3550_3363#
07-09-2012 02:56 PM
is the svi and the physical interface in up and up mode?
sh ip int bri vlan33
sh ip int bri fe0/2
07-09-2012 03:05 PM
3550_3363#sh ip int brief vlan 33
Interface IP-Address OK? Method Status Protocol
Vlan33 192.168.33.1 YES NVRAM up up
3550_3363#sh ip int brief fa0/2
Interface IP-Address OK? Method Status Protocol
FastEthernet0/2 unassigned YES unset up up
07-10-2012 12:02 PM
People, sorry I open the windows firewall on the host and now can PING it...
NOW...I cannot access Internet from the host, even I can ping 192.168.33.1 also my L3 port with valid IP 173.xxx.xxx.90 but I do not ping the gateway or have access to internet....Gateway 173.xxx.xxx.81
Some help?! appreaciated!!!!!
07-10-2012 12:42 PM
hi Hernan,
you need to configure NAT for ur network, ur ISP knows a route to the 176.x.x.90 , but probabely doesnt know a route back to 192.168.33.0
I'm sorry Cat 3550 is not capable of NAT. do u have a router in ur network? or you have to setup a PC Server to do that for u.
Hope it Helps,
Soroush.
07-18-2012 03:28 AM
Soroush,
We have the ISP router, but not access to it...We also got PC Servers, but we are trying to use Stand Alone equipments, as Cisco Switch and Router, in order to avoid the software and server issues...our network is growing and we need to get more stable and secure in distribution and bandwith control. I realize the 3550 can help with some type of speed control inside that particular building.
Can you recommend some hardware?, we need to control speeds per group of users, today we are doing that with a linux server, but as explain before, is not stable.
Thanks!
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