08-04-2008 06:03 AM
hi all,
how is possible that i cannot iniziate a connetion from a server farm with predictor forward? it seems stupid from my point of view..below a conf:
serverfarm forward_tmp
no nat server
no nat client
predictor forward
vserver direct_tmp
virtual 192.168.5.104 255.255.255.252 any
serverfarm forward_tmp
inservice
i can ping to 192.168.5.104 (from outside csm and msfc, external router) but i canno ping from ip 192.168.5.104 (that is a linux server with correct route table...) to router above mentioned.
may you help me?
thx das
08-04-2008 06:12 AM
PS: debug command below
LB: TYPE:0 LENGTH:128 CNTR:0x6a SEQ:0x15d ID:0x1fffee COMMAND: L7 NEW SESSION
sessionID:0x1fffee sessionID_Seq:0x15d vserverID:0x2 RLID:0x7ff9
DST IP:192.168.8.2:0 SRC IP:192.168.5.104:0 Enacps:0x7ff4
03:43:24: CSM2:
LB: TYPE:1 LENGTH:128 CNTR:0x6b SEQ:0x15d ID:0x1fffee
L7 COMMAND: Dest-Decision Cmd
sessionID:0x1fffee sessionID_Seq:0x15d
Failed LB : access-denied
08-04-2008 11:17 AM
Use the following config
vserver direct_tmp
virtual 0.0.0.0 0.0.0.0 any
serverfarm forward_tmp
inservice
Syed
08-04-2008 11:36 AM
tnx....but why???
i've done it before but i cannot understand why...
Das
08-04-2008 12:04 PM
If you use a virtual server with ip 192.168.5.104 then CSM will reply the ARP requests for this IP.
How will CSM send a request to the same Real server ip if it is the local address?
Syed
08-04-2008 12:31 PM
To specify the load-balancing algorithm for the server farm, use the predictor command in the SLB serverfarm configuration submode.
Predictor forward tells the CSM to forward traffic in accordance with its internal
routing tables.
In general the contents are retrieved from cache.For transparent caching mode to retrieve content from the origin server use
virtual 0.0.0.0 0.0.0.0 any
If the CSM is configured in bridge mode. The client VLAN and server VLAN share the same IP address. The same virtual IP address is also configured on the CSM and on the SSLM.
If you do not want NAT to servers in the server farm, use the
no nat server
command in SLB serverfarm configuration submode.
This means this is a transparent redirect so do not change the destination IP address(request toward the server).
The load balance packet IP will not be changed
Similarly if no nat client is configured, the client IP address
in load-balanced packets are not changed
No nat client
Note that the nat server command has no effect when predictor forward is configured, because no servers can be configured.the routing table is used for forwarding.
Hope thisa may help you understand your configuratin.
If you find it useful please add your rating.
Sachin Garg
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