Hi guys,
I have 2 3560G (connected via a etherchannel-trunk link). Both of them connected to a Stack 3750 via fiber.
Originally, I have: HSRP in the LAN (30 VLANs) and VLAN 2 for the swiches (3560Gx2 and 3750) using HSRP too. Static route. No routed ports. Everything was working fine.
However, due of STP one of the fiber is BLOCKED.
So the idea was to remove Vlan2 and converted to routed port and configure static routes (or OSPF later) in order to make load balance (but that's another story).
3560-A ===(Vlan2)=====3750
|| ||
(Trunk, vla2 allowed) (stacked)
|| ||
3560-B===(vlan 2)======3750
I made the following changed: I removed VLAN2, and configured routed ports instead. I can ping among the routers. However, the user (connected behind the 3560s) cannot ping to a subnet behind 3750. Tested using tracert from the user, 3560 is not even responding the first hop; however I can ping standby IP and the physical IP for both (3560).
It was not a routing issue either. There was a default route pointing to 3750. Also made an extended ping in 3560 and it worked.
For some reason, the user cannot ping to a subnet behind 3750 but he can ping to 3560 (standby IP, physical IPs).
The funny thing is the user can ping to another subnet in the 3560.
(*) Only change was: no switchport, ip address x.x.x.x y.y.y.y
3560-A ===(subnet1/30)=====3750
|| ||
(Trunk)+Subnet3/30 (stacked)
|| ||
3560-B====(subnet2/30)=====3750
I rolled back and due this is in production I cannot test again.
Does anybody have a clue?????
Summary of the problem (after changing a SVI port to a routed port):
1) The user (behind 3560) cannot ping to a subnet connected in 3750.
2) The user can ping to any subnet in the 3560.
3) Extendend ping in 3560 to subnect connected in 3750 works....meaning default route is OK.
4) In the tracert, the 3560 is not even answered (based on the wireshark).
5) The user can ping to all Standby, Physical IP in 3560.
Can somebody help me????
WR.
