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CSS11000 VIP not communicating with FWSM Vlans

janith
Level 1
Level 1


There are two physical servers behind the load balancer. These servers are

in VLAN54


SRV212 -  205.190.54.212

SRV213 -  205.190.54.213


Load Balancer VIP for the above servers - 204.190.54.67

Load balancer keep alive port - TCP 9999

Load Balancer VLAN54 IPaddress - 204.190.54.69


mac address of 204.190.54.69 - 000c.abcd.efgh


ARP entries

=======


The FWSM has a static ARP entry for VIP 204.190.54.67 configured with the

mac address of 204.190.54.69.


204.190.54.67   000c.abcd.efgh


Issue

===


The FWSM is the routed interface (with the L3 Gateway) for VLAN54 as well as other server VLANs.

VLAN3 is a point to point vlan that

connects to another L3 boundary, beyond which are located the end users.

These end users are routed via a different L3 gateway and use VLAN3 of the

FWSM to reach the server vlans. The end users routed in different L3

gateways are successfully able to connect to the VIP of the load balancer

and hence connect to the application on the keepalive port of 9999. (a

simple telnet to 204.190.54.67 on tcp port 9999 is opening)


Server VLANs that are routed via the FWSM (with their default gateways set to FWSM) are not able to

connect to the VIP 204.190.54.67 on port 9999. (a ping or a telnet to

204.190.54.67 on tcp 9999 failed.)


Observation

========


server VLANS that are directly routed on the FWSM cannot communicate with the load

balancer VIP 204.190.54.67 where as L3 boundaries that are beyond the FWSM

perimeter can access the VIP (ping and telnet).

Has anyone experienced a similar scenario and if so what should i do to make this work.


Regards

CJ

1 Reply 1

chrhiggi
Level 3
Level 3

CJ-

  Sounds like its asymetric, the firewall is not going to appreciate that and the client will recieve a SYN,ACK from the server directly, not the CSS VIP.  Try configuring a group like this for testing:

Group TestNAT

  add destination service SRV212

  add destination service SRV213

  vip address 204.190.54.67

  active

Regards,

Chris Higgins