11-19-2014 09:54 AM - edited 03-05-2019 12:11 AM
Hi to all.
We have a border router with lots of subinterfaces and some of them have few secondary networks from different subnets on it. I've configured SVI interface on same VLAN in same subnet, but can't ping from this SVI the secondary address, that applied on subinterface on a router.
It seems strange, because on other subinterface, with few secondary networks - all works fine.
All links between swithes and routers are in trunk mode, all switches contains appropriate vlans on their vlan.dat, all appropriate vlans are allowed on switches, all arp entries are present on border router and on switches, all appopriate mac addresses are in mac-add table present.int v
BR conf:
int gi0/1.10
encapsulation dot1q 10
ip add 192.168.1.1 255.255.255.0
ip add 192.168.2.1 255.255.255.0 secondary
int gi0/1.20
encapsulation dot1q 20
ip add 192.168.10.1 255.255.255.0
ip add 192.168.11.1 255.255.255.0 secondary
sw101 conf:
int vlan10
ip add 192.168.1.2 255.255.255.0
no ip route-cache
!
int vlan20
ip add 192.168.10.2 255.255.255.0
no ip route-cache
!
ip default-gateway 192.168.1.1
sw102 conf:
int vlan10
ip add 192.168.1.3 255.255.255.0
no ip route-cache
!
int vlan20
ip add 192.168.10.3. 255.255.255.0
no ip route cache
ip default-gateway 192.168.1.1
!
Connection scheme is trivial: br-->sw101-----L2VPN(QinQ) ISP-->sw102
ping 192.168.1.1 from sw101 & sw102 are successful.
ping to 192.168.10.1 from sw101 & sw102 are fails (sometimes some packets reach to destination - about 1-2 from 5 sended packets)
When i remove secondary ip address from BR (192.168.11.1/24) subinterface - all works fine.
Cannot understand, what's wrong ?
br - 7206VXR (NPE-G2)
sw101 - WS-C3560X-48T-L
sw102 - WS-X45-SUP7L-E
I haven't attach the other configurations of ports (trunk port configuration, vlan database and etc) bcoz i believe the problem not in L2 Layer, i think problem as for arp entries.
P.S. Sorry guys for my english, sorry for probably a stupid question, but i really can't catch it - pls help me to understand that.
11-24-2014 03:23 AM
Hi sgulyamov,
did you try to debug ARP request on Br ?
Could you post the configuration of the Swtich interface connected to Br ?
Bye,
enrico
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