Cisco Firewall :: FWSM On 6500 TCP Connection After Crash On Primary Network
Aug 6, 2012
We are running an FWSM on a 6509 with a SUP720. Firmware 3.2(18), in MultiContext Routed Mode, with shared MSFC.Everything runs fine on this baby most of them time, however occasionally without warning and with no specific pattern the Primary node will fail (as in completely stop responding) and the secondary will takover as active. Two get the primary up agian, I reset the hw-module and then no failover active on the secondary to return the primary as active. However, after this event, I start to experience strange issues with connectivity. Certain TCP src dst combinations will just not work.
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May 3, 2011
We have 2 FWSM modules in each 6500 switches. 1st module is having 04 firewall vlan groups with 18 vlan interfaces in a single context firewall. All are working fine with no issues. Recently we create one more vlan on MFSC and add into the same firewall module. However newly created vlan inside the FW is not able to communicate with outside and also outside users not able to reach newly created subnet. But within the firewall zones (other interfaces) it can communicate. Once we did packet capture we noticed that its hitting firewall outside interface only and when we ping we got TTL expired error. we have default routes to outside and there's no any route inside as new segment is within the firewall (no any hop).
I guess there's no limitation on number of vlans that we can assign on one firewall eventhough there is a limitation for number of vlan-group which is 16 max (but we are within that limit).
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Aug 14, 2011
We have a pair of 6500s with Sup720 running 12.2(33)SXI3. Each has an ACE-20 (s/w A2(2.0)) and FWSM (s/w v3.2(15)). We have reached a limit on the number of rules we can configure on the FWSM, and have determined that we shall upgrade to 4.1(5), with ASDM to 6.2(2)F. A question has been raised regarding the s/w on the ACE-20 modules. Do we need to upgrade them as well?
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Feb 3, 2012
I have had a strange issue with a pair of FWSM's in 2 6500's, it seems there was a failover but both module's have been reset.
CAT1
Feb 03 17:08:46.525: %SNMP-5-MODULETRAP: Module 8 [Down] Trap Feb 03 17:08:46.522: SP: The PC in slot 8 is shutting down. Please wait ...Feb 03 17:09:01.525: SP: shutdown_pc_process:No response from module 8 Feb 03 17:09:11.382: %C6KPWR-SP-4-DISABLED: power to module in slot 8 set off (Reset) Feb 03 17:10:56.093: %DIAG-SP-6-RUN_MINIMUM: Module 8: Running Minimal Diagnostics...Feb 03 17:10:59.796: %SVCLC-5-FWVTPMODE: VTP
[Code]...
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Dec 20, 2012
We run a 6500 with an FWSM with multiple security contexts as well as cascading contexts with a "shared V LAN" . There is a problem with regards to Linux machines and our shared network.
For example, we have three Linux machines in production, each in three separate V LAN's. For me to communicate to these boxes from one V LAN to another I must first ping the server. If I do not ping the server it will not bring up a connection like ssh or HTTP, etc. Below is the error I get from the FWSM that hosts the Linux server, but like I said once I ping the server the error goes away. We only have this problem with Linux machines, and it is a problem for all three of them. Is the FWSM having issues understanding something with all three Linux boxes? Below is the error I get at first, when I try to SSH from one V LAN to another V LAN with the Linux machine.
6 Dec 21 2012 16:33:54 106015 10.255.12.109 22 10.255.1.30 63000
Deny TCP (no connection) from 10.255.12.109/22 to 10.255.1.30/63000 flags SYN ACK on interface inside.
Below is what happens when I initiate a ping to the Linux Server and then ssh again. Notice it builds the connection with no problem after the ping. During the ping it builds the dynamic translation, and then when I ssh it builds the TCP connection. Do you know why this could be?
6 Dec 21 2012 16:35:08 305009 10.255.12.109 10.255.12.109
[Code]....
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Aug 29, 2012
There is a 6500 switch with fwsm. We have extended 2 vlans from the ISP into the FWSM. Also there are atleast 10 other vlans for our internal network. We would like say half of the internal vlans to go out of the 1st ISP vlan and the remaining half from the 2nd ISP vlan. Is there a way we can do this in the FWSM?
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Oct 23, 2012
Firstly is this the right forum to post threads about FWSM's. We have 2 FWSM's in two seperate 6500 switches. There are a number of contexts on each FWSM.I want to fail a context from one FWSM over to the other 6500 and FWSM. Can you tell me how I can do that? Do I need to do it in the admin context and do I need to do it on the admin context of each 6500?
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Jan 3, 2013
We are thinking of introducing ASA's into our setup instead of using FWSM for our firewalls with our 6500. Currently we use multiple contexts with the FWSM, as we provide hosting services for multiple clients and want them behidn their own firewall. My question is how can we make this happen with an ASA. Since with the FWSM we use the backplane of the 6500 and SVI's for all interfaces between them. For example if we have 20 clients what will be the ideal setup for us to use with an ASA. If we can infact use mutiple contexts how can we? Is there a way we can maybe bundle all the ports in the ASA into the 6500 as a layer two trunk port and continue to use SVIs to manage all the clients.
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Dec 3, 2012
I have just joined a networks team and will be working on two fwsm versions 4.0(8) in two 6500 routers. Now the fwsms seem to be virtualised with multiple contexts. The server team want a new context setup for a group of servers behind a vlan. [code]
This context just seems to have two Vlans and a BVI interface. What is the function of this context and why we have 2 admin contexts?
Also another important question is on which 6500 do I create the new context? Is the admin context active on one 6500 just like other contexts and will sync across or do I have to create the new context on both 6500s.
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Jan 29, 2012
Is it possible for me to create 2 vlan interfaces on the 6500 and have them both in the same subnet?
For a specific customer requirement I would like to have a vlan interface on the 6500 as default gateway, sat in it's own vrf, and then route all traffic inbound and outbound to this vlan through the FWSM interface, preferably in the same subnet. I don't think this will be possible so just looking for confirmation either way.
As I will be running EIGRP between a pair of central 6500's and 2 remote offices it will make things much easier for me advertise the connected FWSM interfaces in to EIGRP for access in/out of all my VRF'd subnets. If I need another subnet for each VRF FWSM next hop then I'll have to reditribute a list of statics which I don't really want to do.
The reason I am not just using the FWSM as gateway is because I need to run HSRP across 3 different devices (another 6500 in a second suite), and failover FWSM will only give me 1 level of redundancy for those gateways.
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Feb 24, 2011
I need to remove FWSM from a prodcution 6509. This FWSM is a standby. What's the best way to remove without powering down the switch or impacting antyhing?
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Mar 26, 2012
I'm having problems getting FTP to work through two FWSM virtual contexts which are connected via a vrf. All this is configured on a 6500 switch with the FWSM running 3.1(4)
CLIENT-----CONTEXT_1-------VRF------CONTEXT_2--------FTP_SERVER
At the moment we can make the control connection but when we issue commands the connection times out.
Looking at the logs we can see the initial connection made to the server on port 21 from the client, this is also seen on the second firewall context (nearest the FTP server). The data channel is then seen on the first context, made using high src & dst port numbers and initiated from the client, successfully passing the ACL/Inspection, then on the second context we see the connection being denied by the incoming ACL on the second contexts interface connected to the VRF instance.
The rules are identical on the contexts and have been made by copying and paste the rule using CSM, we are using the predefined service group 'FTP-Group' which contains both tcp 20 & 21. FTP inspection is at default on both contexts.
We have tested with Win XP (capable of Active FTP only) & Firefox 3.6.12 which is the connections we are seeing in the logs trying to do Passive FTP.
Is this a problem with teh contexts randomizing sequence numbers or TCP Normalization? Or do we just have a problem with the Inspection engine on one of the contexts (I would have expected to see this on both contexts if it was a bug).
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Jun 28, 2011
I am just designing a solution where a FWSM consists of 2 contexts initially and has a shared outside interface pointing to the 6500 switch. There are 3 subnets connected to each of the FWSM contexts. So if anyone wants to access these 6 subnets then a route would be needed pointing to the interface vlan of the shared interface on the switch. But that would not be enough to access the subnets.. I am sure we have to define static NATS to point them to the right context where these subnets reside.
The FWSM is running version 3.x code So say 1.1.1.0(shared), 10.10.0.0(inside1), 10.20.0.0(inside2) and 10.30.0.0(inside3) reside in Context 1 and 1.1.1.0(shared), 20.10.0.0(dmz1), 20.20.0.0(dmz2) and 20.30.0.0(dmz3) reside in Context 2 in each of the context we would have to make three static NATS
static(inside1,shared) 10.10.0.0 10.10.0.0 netmask 255.255.255.0
static(inside2,shared) 10.20.0.0 10.20.0.0 netmask 255.255.255.0
static(inside3,shared) 10.30.0.0 10.30.0.0 netmask 255.255.255.0
The same would go for context 2 as well
static(dmz1,shared) 20.10.0.0 20.10.0.0 netmask 255.255.255.0
static(dmz2,shared) 20.20.0.0 20.20.0.0 netmask 255.255.255.0
static(dmz3,shared) 20.30.0.0 20.30.0.0 netmask 255.255.255.0
By creating these NAT statements, would the outside users be able to access the subnets residing in the context?
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Mar 20, 2011
I have a customer that has a FWSM on a 6500, I want to create a read only account for them, i believe user privelage of lvl_3 When I log into the firewall it prompts me for a password straight away.
Is there a way that i can create a login that when it prompts me for a password, I can have a password setup to put into that prompt to get a certain level of access, instead of the standard lvl_15 access
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Aug 24, 2011
I'm looking at upgrading our FWSM modules in our 6500's. They're the WS-SVC-FWM-1 modules.
We're running on version 3.2(12) at the moment and I'm looking to jump up to 4. Any recommendations around whether I should to go to 4.1(6) or 4.0(16)? There aren't any features in particular that I would need in 4.1 but want a good stable base to sit on for 12 months until I look at this exercise all over again.
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Mar 10, 2011
What the support for WCCP on a FWSM running 4.0(7) is like, if there is any at all ?
I've read that the earliest PIX release that supports WCCP was 7.2(1) but I'm not sure how FWSM 4.0(7) aligns with the PIX versions.The only doc's i can find refrencing WCCP on a 6500 with FWSM is in the 6500 12.2 IOS guide.
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May 10, 2012
i do have two 6500 in VSS mode , and one FWSM module on each 6500, i want to configure these modules as Active/Standby, how do i start , should i follow this (not in VSS mode): url..
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Jun 17, 2012
It is my understanding that the FWSM for the 6500 series switches uses a 6 port Etherchannel on the backplane to communicate with the 6500 series switch.Can you shutdown vlan1 on the switch and still communicate with the FWSM? I was under the impression that you could not (although I am looking at a config with it shutdown)
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Jun 26, 2011
I'm using ASDM 6.2 with a FWSM on a 6500.
At the moment everytime I want to make a change to firewall rules I click apply and the rules are applied Immediately. I have to make multiple changes during the working day which I don't like to do.
What I would like to do is make changes during the day but not apply them until out of hours (some sort of batch mode). Like I can do in my check point firewalls.
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Feb 17, 2012
I have 2 modules of FWSM in 6500 switch (failover). I need 5 context. When I use in routed mode (like in the picture) , I cannot ping the servers behind the firewall. (I have ping to FW context) In transparent mode, it is not happening.
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Jun 11, 2012
I have FWSM failover pair, Active/Active configuration, admin and another 4 context, few context active on first FWSM, other on second FWSM.I needed to add VLANs 51 and 52 to FWSMI created VLANs on both Cat6500, created firewall vlan-group 3 a and put "firewall module1 vlan-group 3" on both cat6500Then I log in in system space on primary FWSM and created interface VLAN.Created VLANs automatically occured in system space on Secondary FWSM.Then I wanted allocate VLAN 51 and 52 to context XY, so I went to part of configuration for context XY and "allocate-interface Vlan51" and "allocate-interface Vlan52".
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Nov 23, 2012
tell me for the FWSM (blade on 6500 or 7600) the maximum number of virtual interfaces (VLANs)
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Sep 11, 2012
I have a rare case. switch 6500 make crash and go to rommon. when review the crash appear that the switch charge the configuration from nvram, but, at the ending there are a few line command, that make the switch go to crash.. then I have to booting from rommon and start again. I use the version 12.2.33.sxi9 and 12.2.sxi3 and the configregister is 0x2102
I think that the switch get the startup-config file from other file-system.
*Sep 1 03:42:42.352 Inviern: %SYS-5-CONFIG_I: Configured from memory by console
access-list 199 permit icmp host 10.10.10.10 host 20.20.20.20
crypto map NiStTeSt1 10 ipsec-manual
match address 199
set peer 20.20.20.20
exit
no access-list 199
no crypto map NiStTeSt1
*Sep 1 03:42:46.952 Inviern: %SYS-5-RESTART: System restarted.
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Oct 24, 2012
The switch 6500-E is frequently crashing whenever the pm scp process reach 100% .I got it under the command "remote command switch show proce cpu".How to solve the problem. I opened the TAC and the engineer says to upgrade the image12.2(18) sxf.Is there any other work around that would avoid to reimage the switch and reloading.
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Oct 25, 2012
Our 6500 was reboot by self with crash info and i found it was happened by CPU HOG. The log is below for CPU HOG and you can see many times from attached crash info file.
%SYS-SP-3-CPUHOG: Task is running for (16000)m secs, more than (2000)m secs (15/12),process = RPC pagp_switch_mp2sp.
[code]....
I think this process made high CPU & memory issue and then there were internal communication fail.. isn't it? So i need to know what PRC pagp_switch_mp2sp is to prevent next issue.
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Jun 29, 2012
I want to know what is this process used for on a catalyst 6500 ? we have got following message in the crash file, probably due to CSCsv77354
Jun 30 16:06:47.099 UAE: %SYS-6-STACKLOW: Stack for process ACE HAPI running low, 0/6000
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Jan 19, 2011
I had a problem with a FWSM of 6500 because the FWSM primary change to standby and after back to active.
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Apr 8, 2013
I have Cisco 6500 with FWSM and ACE module which are in one central DC. Also we have four different Datacenter (Hub & spoke) and in our FWSM we have configured four contexts in central DC FWSM for each DC. Each DC servers are different VLAN and IP subnet. Now we have to configure ACE module for load balancing among those different subnet servers. What will be the design and configuration for this solution? Like routed or one-arm mode design.
Scenario Example:
1. App Server01
IP:192.168.11.5/24
GW: 192.168.11.1 in FWSM
FWSM Context: DC1
Physical Location:DC1
VLAN:11
[code].....
Now customer requirement is we have to load balance using ACE between these App Servers which are in different context s in FWSM and one Server is not FWSM. how to configure or design or placement of ACE and FWSM for above scenario.
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Mar 12, 2013
The network gods recently updated our 6500 and upon reboot, the FWSM booted to CF:1 maintence partition,which caused an immediate outage. On the router, I ran the following command to set the default FWSM boot partition to the configuration with:Router#boot device module 4 cf:5 However, it appears the "show boot device" command has been replaced with "show bootvar" which doesn't show me which partition the router will boot the FWSM to. Is there a command I can run from the Router that will actually confirm the boot partition for the FWSM if the router reloads.
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Mar 9, 2007
how to configure FWSM module in cisco core switch 6500
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Mar 2, 2012
I have some doubts about the best solution for the design of a mini data center.In the data center there is a 6500 with FWSM module installed, there are some vlans created, all of them in the fwsm module. For example, a back end server to communicate with a server in the front end must always pass through the firewall. My question is, all these flows passing in the firewall does not degrade the speed of communication?What is the best practice, just pass the communications with the WAN in the firewall, and the vlan communication between front end and back end is only set up in 6500?
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Feb 21, 2012
I have many WiSM WLC's running 7.0.116.0. One WLC was rebooted few days ago but there was no crash file and nothing in logs say why this issue happened.There was a power problem at the same time the WLC rebooted (some switches and PE's was rebooted as well) but if it is a power issue why only one WLC inside the WiSM rebooted and the other WLC is still working fine with no reboot?I have 5 WiSM modules connected to the same 6500 box, only one WLC was rebooted which indicates a crash but no crash file registered for it.Is there anyway I can find the reason why that WLC was rebooted?
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Feb 27, 2011
I have a serious problem with my corporate firewall, witch is an ASA 5520, fv 8.3, with 8 +1 interfaces. It suddenly started to crash every 10/20 minutes and rebooting alone.
First of all I checked system resources witch are in a very low usage state. I also checked interfaces errors, but nothing strange come out o from error counters analysis. I tried disabling logging and all the service policy rules configured, but nothing changed.
Nothing changed and firewall continue restarting by itself.
Last logs I received before crash were:
%ASA-4-711004: Task ran for 35 m sec, Process = Dispatch Unit, PC = 84a619e, Call stack =
%ASA-4-711004: Task ran for 35 m sec, Process = Dispatch Unit, PC = 84a619e, Call stack = 0x084A619E 0x084A6512 0x084A70E1 0x084A7987 0x084A7AAA 0x08558B9B 0x08558E8A 0x083D3518 0x083CA145 0x080659D1 0x089196D9 0x08919790 0x089FF711 0x08A27468
Here the sh crash info command on module 0, after last reboot:
[Code] ......
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