07-31-2016 03:27 AM
Dear
we have a curious problem regarding metro service that connect remote sites (through 3600 and 3750) and the head office (xconnect with asr9010).
here is the configuration :
RP/0/RSP0/CPU0:MyPoP-ASR9010-NPE-01#sh run l2vpn bridge group MyComp bridge-domain XC-Cust-P2MP neighbor [UPE IP] pw-id [XC]
Sun Jul 31 17:02:58.955 WIB
l2vpn
bridge group MyComp
bridge-domain XC-Cust-P2MP
neighbor [UPE IP] pw-id [XC]
split-horizon group
!
myPoP-ME3600-UPE-01#sh run int g0/20 | sec service instance [XC]
service instance [XC] ethernet
encapsulation dot1q [XC]
rewrite ingress tag pop 1 symmetric
xconnect [ASR IP] [XC] encapsulation mpls
from 3600 we connected 2960 and have this log :
Jul 31 00:05:44 WIB: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/23 (1), with router.user FastEthernet3 (30).
Jul 31 00:06:44 WIB: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/23 (1), with router.user FastEthernet3 (30).
Jul 31 00:08:44 WIB: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/23 (1), with router.user FastEthernet3 (30).
Jul 31 00:10:45 WIB: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/23 (1), with router.user FastEthernet3 (30).
Jul 31 00:11:45 WIB: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/23 (1), with router.user FastEthernet3 (30).
I have apply this config on 2960 :
C2960-CPE-01#sh run int g0/23
Building configuration...
Current configuration : 239 bytes
!
interface GigabitEthernet0/23
switchport trunk allowed vlan xx,xx,xx,xx,xx,xx,[XC]
switchport mode trunk
load-interval 30
spanning-tree bpdufilter enable
end
without spanning-tree bpdufilter enable, vlan [XC] will be blocked.
did you have same experience with us and what is the solution.
thank you
Solved! Go to Solution.
08-01-2016 01:11 AM
The customer is using a different native lan (you are using 1 and they are using 30). Easiest fix for you is probably:
interface GigabitEthernet0/23
no cdp enable
08-01-2016 01:11 AM
The customer is using a different native lan (you are using 1 and they are using 30). Easiest fix for you is probably:
interface GigabitEthernet0/23
no cdp enable
08-21-2016 09:25 PM
thanks Philip,
even though CDP was not enable on the interface, this vlan still be blocked,
then I try to reclean my configuration on bridge domain in ASR9k I found miss config then I fix it
the miss config is make some branch become HUB by applying no split horizon and I am sure on that branch use switch that connect to other ISP.
after that the user seems happy coz no ticket (down cause vlan blocked or intermitten) till now
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