11-20-2014 12:54 PM - edited 03-07-2019 09:35 PM
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.
11-20-2014 02:50 PM
Hi,
Can you post the output of "sh run" from all 3 devices?
11-20-2014 10:18 PM
I'll post it ASAP....
11-20-2014 03:17 PM
Hi sgulyamov,
As you have more than ONE svi configured on your switches you are basically
turning then into routers (L3 Switches).
Can you try removing the ip default-gateway
!
no ip default-gateway 192.168.1.1
ip routing
!
ip route 0.0.0.0 0.0.0.0 192.168.1.1
!
Just try on one switch
Let us know if it helps
Regards
Alex
11-20-2014 10:16 PM
Hi,
I try, that you've recommended
but there is the output of ping command from the switch:
sw022#ping 192.168.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.7.1, timeout is 2 seconds:
..!..
Success rate is 20 percent (1/5), round-trip min/avg/max = 1/1/1 ms
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide