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Intervlan Routing Issue
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06-23-2010 03:53 AM - edited 03-04-2019 08:52 AM
I am not able to communicated between vlan 1, 2,3, although inter vlan routing is enabled on cisco 3750 l3 switch.
Bellow is the configuration.
Please suggest on it
APHS_CORE#sh running-config
Building configuration...
Current configuration : 7022 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname APHS_CORE
!
enable secret 5 $1$ZIFI$evixjAIDgo9nV/451.v9U0
enable password 7 14050107
!
no aaa new-model
switch 1 provision ws-c3750g-48ts
ip subnet-zero
ip routing
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/0/1
description WS-038
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/2
description WS-010
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/3
description WS-007
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/4
description WS-009
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/5
description UD01
switchport access vlan 3
storm-control multicast level 0.05
spanning-tree portfast
!
interface GigabitEthernet1/0/6
description PI01
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/7
description PI02
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/8
description LP01
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/9
description HL01
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/10
description EN02
spanning-tree portfast
!
interface GigabitEthernet1/0/11
description HL02
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/12
description WS-011
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/13
description OT1DF2
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/14
description PB2LP1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/15
description PB1CS12
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/16
description PB6LP1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/17
description PB1HL1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/18
description WS-039
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/19
description LP02
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/20
description LP03
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/21
description EN01
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/22
description PB2HL1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/23
description HL03
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/24
description PB1CS34
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/25
description RB01
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/26
description DR-SERVER-LEVEL1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/27
description DR-SERVER-LEVEL2
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/28
description SAL-SERVER1-LEVEL1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/29
description SAL-SERVER2-LEVEL1
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/30
description SAL-SERVER1-LEVEL2
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/31
description SAL-SERVER2-LEVEL2
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/32
description CR-WS01-LEVEL2
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/33
description CR-WS02-LEVEL2
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/34
description CR-WS03-VLAN1
spanning-tree portfast
!
interface GigabitEthernet1/0/35
description CR-WS04-VLAN1
spanning-tree portfast
!
interface GigabitEthernet1/0/36
description CR-WS05-VLAN1
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/37
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/38
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/39
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/40
switchport access vlan 2
spanning-tree portfast
!
interface GigabitEthernet1/0/41
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/42
spanning-tree portfast
!
interface GigabitEthernet1/0/43
spanning-tree portfast
!
interface GigabitEthernet1/0/44
spanning-tree portfast
!
interface GigabitEthernet1/0/45
spanning-tree portfast
!
interface GigabitEthernet1/0/46
switchport access vlan 3
spanning-tree portfast
!
interface GigabitEthernet1/0/47
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/48
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/49
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/50
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/51
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/52
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
ip address 10.36.24.1 255.255.255.0
standby ip 10.36.24.4
!
interface Vlan2
ip address 10.36.25.241 255.255.255.0
standby ip 10.36.25.243
standby priority 110
!
interface Vlan3
ip address 10.36.26.241 255.255.255.0
standby ip 10.36.26.243
standby priority 110
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.36.24.3
ip http server
!
ip access-list extended SAL1
permit udp 10.36.26.0 0.0.0.255 host 10.22.19.16
permit udp any any
ip access-list extended SAL1_out
permit ip host 10.22.19.16 10.36.26.0 0.0.0.255
permit ip host 10.2.219.91 10.36.26.0 0.0.0.255
permit ip host 10.2.161.16 10.36.26.0 0.0.0.255
permit ip host 10.44.108.110 10.36.26.0 0.0.0.255
ip access-list extended SAL2
permit ip 10.36.25.0 0.0.0.255 host 10.22.19.16
permit udp any any
permit ip 10.36.25.0 0.0.0.255 host 10.44.108.110
permit ip 10.36.25.0 0.0.0.255 host 10.2.219.91
deny ip any any
ip access-list extended SAL2_out
permit ip host 10.2.161.16 10.36.25.0 0.0.0.255
permit udp any any
permit ip host 10.22.19.16 10.36.25.0 0.0.0.255
permit ip host 10.44.108.110 10.36.25.0 0.0.0.255
permit ip host 10.2.219.91 10.36.25.0 0.0.0.255
!
access-list 101 deny ip any any
access-list 102 deny ip any any
access-list 111 deny igmp any any
snmp-server community public RO
snmp-server location APHS Control Room
snmp-server contact Suresh Malviya
!
control-plane
!
!
line con 0
line vty 0 4
password 7 104F191116
login
line vty 5 15
password 7 141602031F
login
!
!
end
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06-23-2010 04:09 AM
Hi,
If possible, pls post sh ip route and sh vlan of the switch
HTH
Hitesh Vinzoda
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06-23-2010 04:15 AM
sh ip route
Gateway of last resort is 10.36.24.3 to network 0.0.0.0
10.0.0.0/24 is subnetted, 3 subnets
C 10.36.26.0 is directly connected, Vlan3
C 10.36.24.0 is directly connected, Vlan1
C 10.36.25.0 is directly connected, Vlan2
S* 0.0.0.0/0 [1/0] via 10.36.24.3
10.36.24.3 is router and a static route is given for it
sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi1/0/34, Gi1/0/35, Gi1/0/42
Gi1/0/43, Gi1/0/44, Gi1/0/45
2 VLAN0002 active Gi1/0/1, Gi1/0/2, Gi1/0/3
Gi1/0/4, Gi1/0/12, Gi1/0/18
Gi1/0/27, Gi1/0/30, Gi1/0/31
Gi1/0/33, Gi1/0/36, Gi1/0/37
Gi1/0/38, Gi1/0/39, Gi1/0/40
3 VLAN0003 active Gi1/0/5, Gi1/0/6, Gi1/0/7
Gi1/0/8, Gi1/0/9, Gi1/0/10
Gi1/0/11, Gi1/0/13, Gi1/0/14
Gi1/0/15, Gi1/0/16, Gi1/0/17
Gi1/0/19, Gi1/0/20, Gi1/0/21
Gi1/0/22, Gi1/0/23, Gi1/0/24
Gi1/0/25, Gi1/0/26, Gi1/0/28
Gi1/0/29, Gi1/0/32, Gi1/0/41
Gi1/0/46
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
2 enet 100002 1500 - - - - - 0 0
3 enet 100003 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
------- --------- ----------------- ------------------------------------------
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06-23-2010 05:01 AM
Configure a Routing protocol like EIGRP or RIP v2 in switch for all the vlan Networks.
You're not using a Router for Intervlan Communication.
Normally if ur not using Router in a stick for Intervlan communication, you need to configure a Routing Protocol like EIGRP or RIP.
Best Regards,
Dasuntha
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06-23-2010 05:07 AM
I have already used following commands on the switch
ip routing
router ospf
I thing above commands will enable inter vlan routing.
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06-23-2010 05:11 AM
If you configured ospf properly, we can see routes learned from OSPF.
But in your routing table, I cant see any routes learned from OSPF.
So, double check the OSPF config.
Or show me ur config & i can double check for you.
Regards,
Dasuntha
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06-23-2010 06:02 AM
Advait,
wonder how ospf/eigrp or rip enables inter vlan routing here, unless untill you want to send subnets attached with the Vlans to another device
Just breezed through your configurations:-
1.You need to check whether the "trunking" is happening with the outher switches first. (sh interfaces trunk)
2.The Associated hosts in the Vlan should point to their respective SVI's as gateway. (ping test)
Could you explain the need for Standby ?
3. If using standby in you design, your hosts should point to the standby address configured in the SVI's.
Better if you could get it working in a normal way before hardening it.
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06-23-2010 05:57 AM
Hi,
Post "sh standy brief" from both the switches, also do you have a link between 2 switches.
HTH
Hitesh Vinzoda
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