12-10-2009 10:34 PM - edited 03-06-2019 08:54 AM
Hi All,
I have one L3 switch 3560 and 2 L2 2950 switches connected to it.
1. Trunk enabled on both sides (L3->L2 & L2->L3)
2. Configured Vlan1 on L2 switches (IP: 10.28.1.2)
3. Default gateway on L2 switches is 10.28.1.1 (one of the Vlan IP in L3 switch)
4. Checked Vlan status in L3 is active and connected one PC directly to L3 switch and its able to ping the GW (10.28.1.1)
But I am not able to ping from L2 switches to the default gateway which is one of the Vlan IP in L3 switch.
Is there anything need to check in the configuration or something?
Thanks & Regards,
Naidu.
12-10-2009 11:53 PM
naiduccnp wrote:
Hi All,
I have one L3 switch 3560 and 2 L2 2950 switches connected to it.
1. Trunk enabled on both sides (L3->L2 & L2->L3)
2. Configured Vlan1 on L2 switches (IP: 10.28.1.2)
3. Default gateway on L2 switches is 10.28.1.1 (one of the Vlan IP in L3 switch)
4. Checked Vlan status in L3 is active and connected one PC directly to L3 switch and its able to ping the GW (10.28.1.1)But I am not able to ping from L2 switches to the default gateway which is one of the Vlan IP in L3 switch.
Is there anything need to check in the configuration or something?
Thanks & Regards,
Naidu.
Naidu
Is 10.28.1.1 assigned to vlan 1 on the L3 switch ?
Can you post the following output from all 3 switches
sh ip int brief
sh int trunk
sh ip route
Jon
12-11-2009 12:05 AM
Hi Jon,
Thanks for your quick response.
10.28.1.1 is assigned to Vlan 101 on L3 switch.
sh int trunk & sh ip route not working on L2 switches.
L3 switch output:
Coreswitch - 10.26.6.1#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/1 unassigned YES manual up up
FastEthernet0/2 unassigned YES manual up up
FastEthernet0/3 unassigned YES manual up up
FastEthernet0/4 unassigned YES manual up up
FastEthernet0/5 unassigned YES manual up up
FastEthernet0/6 unassigned YES manual down down
FastEthernet0/7 unassigned YES manual down down
FastEthernet0/8 unassigned YES manual down down
FastEthernet0/9 unassigned YES manual down down
FastEthernet0/10 unassigned YES manual down down
FastEthernet0/11 unassigned YES manual down down
FastEthernet0/12 unassigned YES manual down down
FastEthernet0/13 unassigned YES manual down down
FastEthernet0/14 unassigned YES manual down down
FastEthernet0/15 unassigned YES manual down down
FastEthernet0/16 unassigned YES manual down down
FastEthernet0/17 unassigned YES manual down down
FastEthernet0/18 unassigned YES manual down down
FastEthernet0/19 unassigned YES manual down down
FastEthernet0/20 unassigned YES manual down down
FastEthernet0/21 unassigned YES manual down down
FastEthernet0/22 unassigned YES manual down down
FastEthernet0/23 unassigned YES manual down down
FastEthernet0/24 unassigned YES manual down down
GigabitEthernet0/1 unassigned YES manual up up
GigabitEthernet0/2 unassigned YES manual up up
Vlan1 unassigned YES manual up up
Vlan100 10.26.6.1 YES manual up up
Vlan101 10.28.1.1 YES manual up up
Vlan999 192.16.19.1 YES manual up up
Coreswitch - 10.26.6.1#sh int tru
Coreswitch - 10.26.6.1#sh int trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 1
Fa0/2 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/1 1-1005
Fa0/2 1-1005
Port Vlans allowed and active in management domain
Fa0/1 1,99,100,101,999
Fa0/2 1,99,100,101,999
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1,99,100,101,999
Fa0/2 1,99,100,101,999
Coreswitch - 10.26.6.1#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 not set
10.0.0.0/24 is subnetted, 2 subnets
C 10.28.1.0 is directly connected, Vlan101
C 10.26.6.0 is directly connected, Vlan100
C 192.16.19.0/24 is directly connected, Vlan999
1 L2 Switch Output:
Switch-02#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/1 unassigned YES manual up up
FastEthernet0/2 unassigned YES manual up up
FastEthernet0/3 unassigned YES manual down down
FastEthernet0/4 unassigned YES manual down down
FastEthernet0/5 unassigned YES manual down down
FastEthernet0/6 unassigned YES manual down down
FastEthernet0/7 unassigned YES manual down down
FastEthernet0/8 unassigned YES manual down down
FastEthernet0/9 unassigned YES manual down down
FastEthernet0/10 unassigned YES manual down down
FastEthernet0/11 unassigned YES manual down down
FastEthernet0/12 unassigned YES manual down down
FastEthernet0/13 unassigned YES manual down down
FastEthernet0/14 unassigned YES manual down down
FastEthernet0/15 unassigned YES manual down down
FastEthernet0/16 unassigned YES manual down down
FastEthernet0/17 unassigned YES manual down down
FastEthernet0/18 unassigned YES manual down down
FastEthernet0/19 unassigned YES manual down down
FastEthernet0/20 unassigned YES manual down down
FastEthernet0/21 unassigned YES manual down down
FastEthernet0/22 unassigned YES manual down down
FastEthernet0/23 unassigned YES manual down down
FastEthernet0/24 unassigned YES manual down down
Vlan1 10.28.1.3 YES manual up up
2 L2 Switch Output:
Switch - 10.28.1.2#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/1 unassigned YES manual up up
FastEthernet0/2 unassigned YES manual up up
FastEthernet0/3 unassigned YES manual down down
FastEthernet0/4 unassigned YES manual down down
FastEthernet0/5 unassigned YES manual down down
FastEthernet0/6 unassigned YES manual down down
FastEthernet0/7 unassigned YES manual down down
FastEthernet0/8 unassigned YES manual down down
FastEthernet0/9 unassigned YES manual down down
FastEthernet0/10 unassigned YES manual down down
FastEthernet0/11 unassigned YES manual down down
FastEthernet0/12 unassigned YES manual down down
FastEthernet0/13 unassigned YES manual down down
FastEthernet0/14 unassigned YES manual down down
FastEthernet0/15 unassigned YES manual down down
FastEthernet0/16 unassigned YES manual down down
FastEthernet0/17 unassigned YES manual down down
FastEthernet0/18 unassigned YES manual down down
FastEthernet0/19 unassigned YES manual down down
FastEthernet0/20 unassigned YES manual down down
FastEthernet0/21 unassigned YES manual down down
FastEthernet0/22 unassigned YES manual down down
FastEthernet0/23 unassigned YES manual down down
FastEthernet0/24 unassigned YES manual down down
Vlan1 10.28.1.2 YES manual up up
Thanks & Regards,
Naidu.
12-11-2009 12:14 AM
Naidu
Your problem is that you have used vlan 1 on the switches but vlan 101 on the L3 switch. You can't do this. You either need to
1) on the L3 switch bring up vlan 1 interface and give it the address that is assigned to vlan 101
OR
2) a better solution is to shutdown vlan 1 interface on each L2 switch. Create a vlan 101 L3 interface and give it the IP address you have currently assigned to vlan 1 eg.
2950(config)# int vlan 1
2950(config-if)# no ip address
2950(config-if)# shut
2950(config)# int vlan 101
2950(config-if)# ip address 10.28.1.2 255.255.255.0
2950(config-if)# no shut
Jon
12-11-2009 01:26 AM
Hi Jon,
What I through really is the Vlan1 on L2 switches as a Management IP for them.
And one of the Vlan IP on L3 switch used as a DG for L2 switches
Is that wrong?
As you guided, I shutdowned the Vlan1 in L2 switches and creaed one Vlan101 (10.28.1.2) Still I am unable to ping from L2 switches to their DG.
DG is one of the Vlan IP on L3 switch.
Please find the below confing of one of the L2 switch:
Switch - 10.28.1.2#sh run
Building configuration...
Current configuration : 1183 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname "Switch - 10.28.1.2"
!
ip name-server 0.0.0.0
!
!
interface FastEthernet0/1
description connected to Coreswitch-01
switchport mode trunk
!
interface FastEthernet0/2
switchport access vlan 101
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface Vlan1
ip address 10.28.1.2 255.255.255.0
shutdown
!
interface Vlan101
ip address 10.28.1.2 255.255.255.0
!
ip default-gateway 10.28.1.1
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
Thanks & Regards,
Naidu.
12-11-2009 01:41 AM
Naidu
What I through really is the Vlan1 on L2 switches as a Management IP for them.
And one of the Vlan IP on L3 switch used as a DG for L2 switches
Is that wrong?
Yes, it is wrong. The switches send their traffic in vlan 1 but on the L3 switch you have used vlan 101 for the same subnet so this traffic will never get through. If you are using subnet 10.28.1.0/24 then all switches must agree on the vlan used for it.
On your 2950 switch
int vlan 1
no ip address
then can you post
"sh ip interface brief"
"sh interface trunk"
"sh vlan"
from that 2950.
Jon
12-11-2009 06:36 AM
Hi Jon,
I removed the IP address for Vlan 1
Please find the below required details and config of one of the switch.
Switch-02#sh run
Building configuration...
Current configuration : 1103 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch-02
!
!
!
interface FastEthernet0/1
description connected to Coreswitch-01
switchport mode trunk
duplex full
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface Vlan1
no ip address
!
interface Vlan101
ip address 10.28.1.2 255.255.255.0
!
ip default-gateway 10.28.1.1
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
Switch-02#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/1 unassigned YES manual up up
FastEthernet0/2 unassigned YES manual up up
FastEthernet0/3 unassigned YES manual down down
FastEthernet0/4 unassigned YES manual down down
FastEthernet0/5 unassigned YES manual down down
FastEthernet0/6 unassigned YES manual down down
FastEthernet0/7 unassigned YES manual down down
FastEthernet0/8 unassigned YES manual down down
FastEthernet0/9 unassigned YES manual down down
FastEthernet0/10 unassigned YES manual down down
FastEthernet0/11 unassigned YES manual down down
FastEthernet0/12 unassigned YES manual down down
FastEthernet0/13 unassigned YES manual down down
FastEthernet0/14 unassigned YES manual down down
FastEthernet0/15 unassigned YES manual down down
FastEthernet0/16 unassigned YES manual down down
FastEthernet0/17 unassigned YES manual down down
FastEthernet0/18 unassigned YES manual down down
FastEthernet0/19 unassigned YES manual down down
FastEthernet0/20 unassigned YES manual down down
FastEthernet0/21 unassigned YES manual down down
FastEthernet0/22 unassigned YES manual down down
FastEthernet0/23 unassigned YES manual down down
FastEthernet0/24 unassigned YES manual down down
Vlan1 unassigned YES manual up up
Vlan101 10.28.1.2 YES manual up up
Switch-02#sh interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/1 1-1005
Port Vlans allowed and active in management domain
Fa0/1 1,101
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1
Switch-02#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
101 VLAN0101 active Fa0/2
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
101 enet 100101 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
Remote SPAN VLANs
------------------------------------------------------------------------------
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
Thanks & Regards,
Naidu.
12-11-2009 07:37 AM
Naidu
Can you still not ping the gateway 10.28.1.1 ?
Jon
12-11-2009 08:04 AM
From your output
Switch-02#sh interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/1 1-1005
Port Vlans allowed and active in management domain
Fa0/1 1,101
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1
Did you create vlan 101 on the L3 switch? Is it allowed on the other side?
I've first to review your config. Maybe it's in there
Can you post a show run int fasx/x of the connected interface at the l3 switch?
12-11-2009 08:17 AM
davy.timmermans wrote:
From your output
Switch-02#sh interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 1Port Vlans allowed on trunk
Fa0/1 1-1005Port Vlans allowed and active in management domain
Fa0/1 1,101Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1Did you create vlan 101 on the L3 switch? Is it allowed on the other side?
I've first to review your config. Maybe it's in there
Can you post a show run int fasx/x of the connected interface at the l3 switch?
Davy
Good spot, i missed that
Jon
12-14-2009 12:56 AM
Hi Jon,
Yes I have created vlan 101 in L3 switch and in L2 switch.
Please find the below running config of L2 switch:
Switch-02#sh run
Building configuration...
Current configuration : 1120 bytes
!
version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch-02
!
!
!
interface FastEthernet0/1
description Connected to L3
switchport mode trunk
duplex full
!
interface FastEthernet0/2
switchport access vlan 101
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface Vlan1
no ip address
!
interface Vlan101
ip address 10.28.1.2 255.255.255.0
!
ip default-gateway 10.28.1.1
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
Please find the below vlan info in L3 switch and the interface config which was connected to L2 switch:
interface FastEthernet0/2
description Connected to Switch-02
switchport mode trunk
duplex full
Coreswitch - 10.16.6.1#sh vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active 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
99 VLAN0099 active
100 VLAN0100 active Fa0/4
101 VLAN0101 active Fa0/3
999 VLAN0999 active Fa0/5, Gig0/1, Gig0/2
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
Regards,
Naidu.
12-15-2009 05:30 AM
Hi Jon,
Any findings on my previous post. I am eagerly waiting for the solution.
Regards,
Naidu.
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