05-27-2013 05:48 AM - edited 03-07-2019 01:34 PM
Hi all on my lab I have a cisco 876 with, c870-adventerprisek9-mz.124-6.T9.bin.
I have configured a VLAN with ID 230, an SVI with IP 192.168.230.1/24 and I have assigned switch port fa 2 to it…
interface Vlan230
ip address 192.168.230.1 255.255.255.0
VLAN ISL Id: 230
Name: testDHCPvlan
Media Type: Ethernet
VLAN 802.10 Id: 100230
State: Operational
MTU: 1500
sh int fastEthernet 2 switchport
Name: Fa2
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Disabled
Access Mode VLAN: 230 (testDHCPvlan)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 230
Protected: false
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
On int fast 1 on vlan 1 i have given an IP 192.168.82.1 /24
As you can see I have connectivity
sh ip ro
C 192.168.230.0/24 is directly connected, Vlan230
C 192.168.82.0/24 is directly connected, Vlan1
#ping 192.168.230.3 source vlan 230
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.230.3, timeout is 2 seconds:
Packet sent with a source address of 192.168.230.1
!!!!!
BUT
If I ping hosts on vlan 230 from hosts on VLAN 1…
Router#ping 192.168.230.3 source vlan 1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.230.3, timeout is 2 seconds:
Packet sent with a source address of 192.168.82.1
.....
Success rate is 0 percent (0/5)
WHY is this happening? Could somebody explain me?
i am supposed to have full conectivity between vlans (no Access lists or FW)
Thank you in advance
Stratos
05-27-2013 06:48 AM
Hi Stratos,
You have mentioned that "On int fast 1 on vlan 1 i have given an IP 192.168.82.1 /24". Do you have any device connected to this port?
Could you please provide output of below commands?
show ip int brief
show vlan-switch
Regards
Najaf
Please rate when applicable or helpful !!!
05-27-2013 06:58 AM
Hi,
becasue sh ip route shows that routes ar connected so it seems that vlan interfaces are UP.
Please check your configuration. Below is part of configuration which works fine. It should ping no problem.
Please also double-check that your PC's has correct default GW,IP and netmask configured.
!
interface FastEthernet0/0/0
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/0/1
switchport access vlan 230
switchport mode access
spanning-tree portfast
!
!
interface Vlan1
ip address 192.168.82.1 255.255.255.0
!
interface Vlan230
ip address 192.168.230.1 255.255.255.0
!
Regards,
Jan
05-27-2013 11:29 PM
Well here is my Vlan configuration
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: 230
Name: testDHCPvlan
Media Type: Ethernet
VLAN 802.10 Id: 100230
State: Operational
MTU: 1500
int Vlan are up up...
Jan i know that this is the congiguration that works, BUT why it doesnt work on 876?
PC on VLAN 230 is takes IP from DHCP on my Router...my PC configuration are fine...no FW enabled...Besides i can ping pc from the Router with its VLAN as source...
thank you
05-28-2013 12:06 AM
Hi Stratos,
Do you have any PC on VLAN1? If not could you please move exisisting PC to VLAN 1 and assign 192.168.82.x ip address and verify if you are able to ping VLAN1's gatewway (192.168.82.1) from this PC?
Also could you please share the interface configuration on this device?
Regards
Najaf
Please rate when applicable or helpful !!!
05-28-2013 12:50 AM
Hello,
why you are pinging so coplicated? As Najaf stated please ping VLAN1 interface(gw) from PC which is connected to VLAN1 and then ping VLAN230 interface(gw) from PC connected to VLAN230.
Also please post whole configuration of router to better investigate where could be problem.
Thanks.
Best regards,
Jan
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