Traffic movement through FWSM
Hi Experts,
Please have a look in the following pic regarding the deployment of FWSM will traffic move from 7613 to 6513 as it use to be now after deploying FWSM by this way ,currently FWSM is in 7613 chasis.
Actually I need to know some points.
1.If we change Gi0/1 routed port to L2 port by switch port cmmd and assign to VLAN 10 and create SVI interface VLAN 10 on MSFC of 7613 and assign IP of Gi0/1 i.e 192.168.1.10 to it will the traffic move from interfaces of my router to this interface (Gi0/1) currently we have static routes , I am not very much clear about this issue.
2.As mentioned in figure if create VLAN 10 and put Gi0/1 and inside interface ofFWSM will they communicate through SVI interface of VLAN 10 created on 7613 router with IP 192.168.1.10 and same concern for outside interface of FWSM and Gi0/2 of 6513 which are connected through SVI VLAN 20 on 6513 MSFC
please guide me know what correction I have to make in this plan.
Regards
Ambivert skill
Dear members I am really waiting for your valuable comments on this deployment plan.
Thanks
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Inside ()---- Access-sw----------Core-SW------------DMZ
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HI,
I've built a site-to-site VPNs between a PIX and an ASA with traffic passing through an FWSM.
This is the architecture:
LAN1---PIX--------(dmz interface)FWSM(otuside interface)--------ASA----LAN2
The VPNs go up regurarly but I am experencing some performance issue so I am trying to look into the logs.
In the FWSM log I can see a lots of these entries regarding esp protocol traffic between end point peer:
6|Jan 29 2014|13:07:56|302022|||||Built IP protocol 50 connection 144547910545237602 for outside:x.x.x.x(x.x.x.x) to dmz:y.y.y.y (y.y.y.y)
6|Jan 29 2014|13:07:56|302022|||||Built IP protocol 50 connection 144547910545237601 for dmz:x.x.x.x(x.x.x.x) to outside:y.y.y.y (y.y.y.y)
x.x.x.x and y.y.y.y are the vpn peers ip addresses, but I am suspecting some strange behaviour because I see x.x.x.x an y.y.y.y respectively at the same time on outiside interface and on dmz interface during the build of ip protocol 50 connection.
Do you think it is a normal behaviour or it means that it's a fault?
Pls any suggestion will be very appreciated.
Thanks
angeloHi Marcin, thanks for you reply.
Yes I know, I expected two flows for inbound and outbound, it's correct but I don't understand why the FWSM see the same IP incoming both interfaces, dmz and outside. That seems strange. If x.x.x.x is on dmz and y.y.y.y on outside, what does this entry means? :
6|Jan 29 2014|13:07:56|302022|||||Built IP protocol 50 connection 144547910545237602 for outside:x.x.x.x(x.x.x.x) to dmz:y.y.y.y (y.y.y.y).
Hi
angelo -
Only some of the traffic passing through inline vlan pair
Here is my network setup
firewall<---- >(g1/2)Coreswitch 6500 with IDSM(TG9/1)<-----> (TG9/1) Distrib switch with FWSM---------Accessswitch
configuration in core switch
interface GigabitEthernet1/2.11
description **** ****
encapsulation dot1Q 211
ip vrf forwarding VRF11
ip address 10.2.11.73 255.255.255.248
ip ospf network point-to-point
standby 1 ip 10.2.11.75
standby 1 priority 110
standby 1 preempt
interface GigabitEthernet1/2.37
description **** ****
encapsulation dot1Q 237
ip vrf forwarding VRF37
ip address 10.2.37.73 255.255.255.248
ip ospf network point-to-point
standby 1 ip 10.2.37.75
standby 1 priority 110
standby 1 preempt
interface TenGigabitEthernet9/1.11
description **** ****
encapsulation dot1Q 311
ip vrf forwarding VRF11
ip address 10.2.11.2 255.255.255.252
ip ospf network point-to-point
interface TenGigabitEthernet9/1.12
description **** ****
encapsulation dot1Q 312
ip vrf forwarding VRF12
ip address 10.2.12.2 255.255.255.252
ip ospf network point-to-point
configuration in Distribution switch:
interface TenGigabitEthernet9/1.11
description **** ****
encapsulation dot1Q 311
ip vrf forwarding VRF11
ip address 10.2.11.1 255.255.255.252
no ip route-cache
ip ospf network point-to-point
interface TenGigabitEthernet9/1.37
description ********
encapsulation dot1Q 337
ip vrf forwarding VRF37
ip address 10.2.37.1 255.255.255.252
no ip route-cache
ip ospf network point-to-point
i have seggregated n/w like this. i am using inline vlan pair , to pass all the traffic through the IDSM module ,
i am using the monitoring port gi0/8
config in core switch
intrusion-detection module 8 data-port 2 trunk allowed-vlan 211-260,311-360
IDSM
physical-interfaces GigabitEthernet0/8
subinterface-type inline-vlan-pair
subinterface 11
description
vlan1 211
vlan2 311
exit
subinterface 37
description
vlan1 237
vlan2 337
exit
Problem i am facing is , some of the vlan-pair traffic passing through the IDSM some of the traffic are not passing , here i have given the statistics
MAC statistics from interface GigabitEthernet0/8
Statistics From Subinterface 11
Statistics From Vlan 211
Total Packets Received On This Vlan = 0
Total Bytes Received On This Vlan = 0
Total Packets Transmitted On This Vlan = 0
Total Bytes Transmitted On This Vlan = 0
Statistics From Vlan 311
Total Packets Received On This Vlan = 0
Total Bytes Received On This Vlan = 0
Total Packets Transmitted On This Vlan = 0
Total Bytes Transmitted On This Vlan = 0
Statistics From Subinterface 37
Statistics From Vlan 237
Total Packets Received On This Vlan = 3189658726
Total Bytes Received On This Vlan = 64165872092928
Total Packets Transmitted On This Vlan = 3549575166
Total Bytes Transmitted On This Vlan = 64165872092928
Statistics From Vlan 337
Total Packets Received On This Vlan = 3549575166
Total Bytes Received On This Vlan = 64165872092928
Total Packets Transmitted On This Vlan = 3189658726
Total Bytes Transmitted On This Vlan = 64165872092928
Statistics From Subinterface 38
Statistics From Vlan 238
Total Packets Received On This Vlan = 2215151150
Total Bytes Received On This Vlan = 64165872092928
Total Packets Transmitted On This Vlan = 126546964
Total Bytes Transmitted On This Vlan = 64165866995200
Statistics From Vlan 338
Total Packets Received On This Vlan = 126546964
Total Bytes Received On This Vlan = 64165866995200
Total Packets Transmitted On This Vlan = 2215151150
Total Bytes Transmitted On This Vlan = 64165872092928
Give me idea experts , so that i can resolve this issue.
Help me thanks in advanceI believe the issue is because of the config below:
interface GigabitEthernet1/2.11
description **** ****
encapsulation dot1Q 211
ip vrf forwarding VRF11
ip address 10.2.11.73 255.255.255.248
ip ospf network point-to-point
standby 1 ip 10.2.11.75
standby 1 priority 110
standby 1 preempt
encapsulation dot1Q 311
ip vrf forwarding VRF11
ip address 10.2.11.2 255.255.255.252
ip ospf network point-to-point
interface TenGigabitEthernet9/1.12
description **** ****
encapsulation dot1Q 312
ip vrf forwarding VRF12
ip address 10.2.12.2 255.255.255.252
ip ospf network point-to-point
As you can see we have 2 ip subnets in the VRF 11 .73 & .2 in vlan 211 & 311 respectively.
The switch is doing intervlan routing directly without having to go through the IDSM for VRF 11.
What we need to remember is IDSM does not do routing, and it can only bridge vlans.
Hence we have to force to packet to go through the IDSM.
Here is what we do when we use IDSM to see traffic going between vlans.:
Normally, with vlans, and IDSM inline mode, we have one IP subnet and 2 Vlans.
IDSM2 in inline mode necessitates an additional artificial Vlan on the SAME subnet as the Vlan you wish to sense.
A layer 3 switch interface needs to be configured within this additional artificial Vlan.
In a nutshell, we need to create 2 Vlans that share one same ip subnet and put SVI on only one of the Vlans.
In your case you will need one ip between vlans 211 & 311 in VRF 11 to force the data to go through the IDSM.
I can understand if this is a bit tricky to understand.
Please go through my design document for IDSM inline mode, which explains the basic concepts and packet walk in detail.
It will explain why we need the above and how arp makes the mac-address table populate correct entries, (with one ip subnet for 2 vlans) so that traffic goes through the IDSM.
https://supportforums.cisco.com/docs/DOC-12206
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