10-20-2023 03:24 AM
Hello,
I have a ISR4K router connected through Portchannel to a Cisco 3850 switch.
Everything is ok so I have put an IP to port-channel on router side and it is pingable.
Meanwhile I have created som BVI interfaces working on different Vlans lets say 20, 30 and 50. The BVI have also IP addresses and I have enabled vlan on this. and created a DHCP pool on the router.
But if I put a port as access vlan 20 on the switch it does not get DHCP on Vlan 20
DHCP not passing so tagget packets do not pas the Portchannel.
Any idea or is it something that I am missing?
REgards,
Enkli
10-20-2023 03:28 AM
Vlan and BVI and port channel!! Sorry I so confused here.
Can you share router config and topolgy
10-20-2023 04:09 AM
You need to provide more information here and configuration
if the Port-channel is Layer 3 then you need to have associated sub-interface for the respected VLAN to work as expected (as i understand your input from the post)
10-20-2023 12:18 PM
Thanks to all for the replies.
This is a part of it
ip dhcp excluded-address 192.168.10.1 192.168.10.10
ip dhcp excluded-address 192.168.40.1 192.168.40.10
ip dhcp excluded-address 192.168.50.1 192.168.50.10
ip dhcp excluded-address 192.168.99.1 192.168.99.10
!
ip dhcp pool DHCPool_10
network 192.168.10.0 255.255.255.0
default-router 192.168.10.1
dns-server 9.9.9.9
!
ip dhcp pool DHCPool_40
network 192.168.40.0 255.255.255.0
default-router 192.168.40.1
dns-server 9.9.9.9
!
ip dhcp pool DHCPool_50
network 192.168.50.0 255.255.255.0
default-router 192.168.50.1
dns-server 9.9.9.9
!
ip dhcp pool DHCPool_99
network 192.168.99.0 255.255.255.0
default-router 192.168.99.1
dns-server 9.9.9.9
!
!
!
login on-success log
!
!
!
!
!
!
!
subscriber templating
!
!
!
!
!
vtp domain telenor
vtp mode transparent
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
ucse subslot 1/0
imc access-port shared-lom console
imc ip address 192.168.10.81 255.255.255.0 default-gateway 192.168.10.80
!
diagnostic bootup level minimal
!
spanning-tree mode rapid-pvst
spanning-tree loopguard default
spanning-tree extend system-id
!
!
redundancy
mode none
!
bridge-domain 10
!
!
!
!
!
vlan internal allocation policy ascending
!
vlan 9-10,40,50,99,911
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Port-channel1
no ip address
no negotiation auto
service instance 9 ethernet
encapsulation untagged
bridge-domain 9
!
service instance 10 ethernet
encapsulation dot1q 10
bridge-domain 10
!
!
interface GigabitEthernet0/0/0
no ip address
negotiation auto
channel-group 1
!
interface GigabitEthernet0/0/1
description WAN - FTTP Uplink
no ip address
negotiation auto
service instance 100 ethernet
encapsulation untagged
bridge-domain 100
!
!
interface GigabitEthernet0/0/2
no ip address
negotiation auto
channel-group 1
!
interface GigabitEthernet0/1/0
!
interface GigabitEthernet0/1/1
!
interface GigabitEthernet0/1/2
!
interface GigabitEthernet0/1/3
!
interface ucse1/0/0
ip unnumbered Vlan10
ip nat inside
no negotiation auto
switchport mode trunk
no mop enabled
no mop sysid
!
interface ucse1/0/1
no ip address
no negotiation auto
switchport mode trunk
no mop enabled
no mop sysid
service instance 10 ethernet
encapsulation dot1q 10
bridge-domain 10
!
service instance 40 ethernet
encapsulation dot1q 40
bridge-domain 40
!
!
interface GigabitEthernet0
vrf forwarding Mgmt-intf
no ip address
negotiation auto
!
interface Vlan1
no ip address
!
interface Vlan9
no ip address
!
interface Vlan10
no ip address
ip nat inside
!
interface Vlan40
no ip address
!
interface Dialer0
mtu 1492
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip access-group Remote_access in
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
no cdp tlv app
ppp mtu adaptive
ppp authentication chap callin
ppp chap hostname bthomehub@btbroadband.com
ppp chap password 0 BT
ppp ipcp dns request
ppp ipcp route default
!
interface BDI10
ip address 192.168.10.1 255.255.255.0
ip nat inside
encapsulation dot1Q 10
!
interface BDI40
no ip address
encapsulation dot1Q 40
!
interface BDI100
ip address dhcp
ip nat outside
!
ip http server
ip http authentication local
ip http secure-server
ip http client source-interface GigabitEthernet0/0/1
ip forward-protocol nd
ip nat inside source route-map DYNAMIC_RMAP interface BDI100 overload
ip route 192.168.10.81 255.255.255.255 ucse1/0/0
ip route 192.168.10.252 255.255.255.255 ucse1/0/0
ip route 192.168.10.253 255.255.255.255 ucse1/0/0
!
!
R1#
Su currently I want to distribute DHCP over VLAN on the switch ports...
10-23-2023 12:18 PM
any suggestion on this?
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