FWSM ARP problem

Similar Questions

• FWSM Configuration problem

  Hello

  Please can someone help with the following problem:

  I have 659 with FWSM, I configured the FWSM in routed Mode unique.

  My requirement is to make the MSFC behind the firewall, so I need only two VLANS to act as a firewall interfaces, all other VLAN should through the MSFC.

  I used the vlan 100 as inside of VLANs and vlan 101 as Vlan outside and I did all the required configurations on the 6509 (switch, MSFC) and the firewall.

  The problem is: outside VLAN (101) is not coming on the MSFC even if there is an active port on this vlan (which is the router connected to the VLAN outside!)

  Why this vlan is not coming? Help, please

  This is the configuration I used on 6509 and FWSM (I included only the related configuration)

  ON FWSM:

  -----------------

  nameif vlan101 off security0

  nameif vlan100 inside the security100

  IP outdoor 62.149.76.2 255.255.255.248

  IP address inside 10.8.100.2 255.255.255.0

  Route outside 0.0.0.0 0.0.0.0 62.149.76.126 1

  Route inside 10.8.0.0 255.255.0.0 10.8.100.1 1

  6509 (Switch):

  --------------------

  name of vlan 100 inside set

  name of vlan 101 Set out

  define the vlan 100-101 firewall - vlan 8

  6509 (MSFC):

  -------------------------

  interface Vlan100

  Description inside of vlan

  IP 10.8.100.1 255.255.255.0

  !

  interface Vlan101

  Besides description of vlan

  IP 62.149.76.1 255.255.255.248

  ----------------------------------------------

  Yes, that's correct. This way you will get a unique link between the MSFC and FW.

  For your MSFC your default gateway will be 10.8.100.2. Inside networks for your FW, will point to 10.8.100.1, that you specified. There is no need for interface VLAN 101 of the MSFC. Keep 101 as is, otherwise.

  I hope this helps.

• FWSM - NAT problem

  Anyone know if the worm 1.1 (3) fwsm supports bidirevtional nat or outside nat in the pix the fact?

  Thanks for any help

  Best regards

  Fabio Bellini

  Fabio,

  Nope, not bidirectional or outside NAT is supported in the FWSM 1.1 code (3). We add this to the 2.1 code which should be out in the first of the year. 1.1 in the FWSM mirrors PIX 6.0 code (with the exception of OSPF). The FWSM 2.1 code should reflect the code PIX 6.3. So, whatever it be added after 6.0 in the PIX won't be supported until FWSM 2.1. I hope this helps.

  Scott

• FWSM and ARP SNMP MIB

  Hello

  I have two cards FWSM in two 6513 switches with active failover.

  Connected to the switches are several servers connected to different interfaces of the firewall. One of them is a HPOV (openview) needs the ARP table of the FWSM to reach and explore the net together to start to monitorize the network.

  My problem is that I can't get the firewall ARP table, so I can't find out more devices, I am able to SNMP them by editing the poller SNMP in the configuration file of OVO, but even network devices is displayed, it cannot achieve the work.

  I stick my worm here sh.

  FWSM-1 # sh ver

  FWSM Firewall Version 3.2 (1)

  Version 5.2 (1) F Device Manager

  Updated Friday, June 7 07 20:16 by which

  FWSM-1 up to 7 days, 13 hours

  1 year 94 days upwards failover cluster

  Material:-WS-SVC-FWM-1, 1024 MB RAM, Pentium III 1000 MHz processor

  Flash Flash STI 7.2.0 @ 0xc321, 20 MB

  0: Int: do not license: irq 5

  1: Int: do not license: irq 7

  2: Int: do not license: irq 11

  The activation key running is not set, using the default settings:

  The devices allowed for this platform:

  Maximum Interfaces: 256

  Internal hosts: unlimited

  Failover: Active/active

  VPN - A: enabled

  VPN-3DES-AES: enabled

  Cut - through Proxy: enabled

  Guardians: enabled

  URL filtering: enabled

  Security contexts: 2

  GTP/GPRS: disabled

  Heel of BGP: disabled

  VPN peers: unlimited

  Serial number: SAD101804FV

  Activation key running: 0x00000000 0x00000000 0x00000000 0x00000000

  Configuration changed from enable_1 to 13:59:35.590 THIS Monday, November 3, 2008

  I think that version 3.2 can not recover the MIB for ARP, and I found this version 4.01 only. But I was unable to find any kind of upgrade notes here, and we have the control of server farms proyect sttoped for this problem.

  Any who had this problem?

  How did solve you this?

  Thank you!

  Angel,

  You're right, '(IP - MIB) ARP table entries' MIB was introduced in 4.0 (1) and you have to upgrade to 4.0 code to get to the ARP Table via SNMP MIB.

  And here is the document that contains information on the FWSM upgrade.

  http://www.Cisco.com/en/us/docs/security/FWSM/fwsm40/configuration/guide/swcnfg_f.html#wp1052902

  Kind regards

  Arul

  * Rate pls if it helps *.

• Failover FWSM problem

  Hello world

  I have a question on the FWSM failover.

  I understand that I can configure? polling frequency? to detect the loss of accessibility between FWSM Active and standby FWSM and not configure? number of polling stations in attempts? This Eve FWSM recognize active FWSM fails.

  I changed? mark for 3 (minimum value) to confirm what time is necessary (elapsed) to get back successfully done.

  The result of my survey, about 30 seconds (elapsed) to take necessary supported successfully completed.

  So I think that 30 seconds is the minimum (best) time to take care that it was completed successfully, because I can change? polling frequency? not only,? number of retries?

  My understanding is correct?

  Or y at - it no parameters to speed up takes less than 30 seconds?

  Your information would be greatly appreciated.

  Best regards

  Hello

  How fast FWSM can start checking the failover process?

  Primary (config) # polltime failover [Unit] [MS] number [holdtime seconds]

  -> Unit number [MS] polltime - how fast you want the gof mark/recording of the State of the interface before the failover control process has begun.

  The amount of time between hello messages. That set the time in seconds between 1 (faster) and 15. The default value is 1 second. If you specify msec, you can set the time between 500 and 999 milliseconds.

  -> holdtime number - sets the time during which a unit must receive a message hello on the failover link, otherwise the supply unit begins the process of test for non-peers. Set the time in seconds between 15 and 45. The default value is the higher of 15 seconds or 3 times the polltime. You cannot enter a value that is less than 3 times the polltime. That means that the lowest or faster time keeping is 15 sec.

  time = 15 sec

  It is a verification of the standard during failover process to verify, before the new blade is elected active FWSM:

  1. link up/down test? A test of the VLAN State. If the link up/down test indicates the VLAN is operational, then the FWSM performs network tests. The purpose of these tests is to generate network traffic to determine which (if there are two) unit has failed. At the beginning of each test, each unit clears the number of packets received for its interfaces. At the end of each event, each unit looking to see if she has received any traffic. If so, the interface is considered operational. If a unit receives traffic for a test and the other device does not work, the unit that received no traffic is considered as impossible. If no unit has received traffic, the next test is used.

  2. test of network activity? A received network activity test. The unit counts all packets received for 5 seconds. If all the packets are received at any time during this interval, the interface is considered operational and analysis stops. If no traffic is received, at the beginning of the ARP test.

  * time = 5 seconds

  3. ARP test? A reading of the unit of ARP cache for 2 more recently acquired entries. One at a time, the unit sends ARP request to these machines, to try to stimulate the network traffic. After each request, the unit of account all traffic received for 5 seconds. If the traffic is received, the interface is considered operational. If no traffic is received, an ARP request is sent to the next machine. If at the end of the list, no traffic is received, the ping test begins.

  * time = 5 seconds

  4 spread the Ping test? A ping test which is to send a broadcast ping request. The unit has so all packets received for 5 seconds. If all the packets are received at any time during this interval, the interface is considered operational and analysis stops.

  * time = 5 seconds

  * estimated control failover time = 15 sec

  Total = 30secsonds.

  http://www.Cisco.com/en/us/products/hw/switches/ps708/products_module_configuration_guide_chapter09186a00802010c0.html#wp1109055

  Rgds,

  AK

• Problem with FWSM and the same L3 interface switch

  I have two 6513 s with a 802. 1 q trunk linking them. Each switch is redundant Sup720s running in native mode, worm IOS 12.2 (18) SXF (that they were running out of SXD3). A FWSM (ver 2.3 (3), routed mode, unique context) is in each switch, Setup in failover mode.

  I can't get a PC in a virtual LAN that has the defined layer 3 interface on the switch with the active FWSM in this document, to communicate with the devices 'behind' the FWSM. If I move the configuration of layer 3 to this vlan to the other 6513, everything works fine.

  The MSFCs are inside the firewall, they have a configured layer 3 interface in the same vlan as the FWSM 'inside' interface. Several "same security level" interfaces are defined on the FWSM and used to protect the farms. I use OSPF on the MSFCs and FWSM and the routing table is correct.

  The FWSM generates connections to the attempts made by the PC with interface layer 3 defined on the same switch as the active FWSM very well, so this isn't a problem with FWSM ACL.

  A ping of the FWSM "inside" interface from a PC with the defined layer 3 interface on the same switch as the active FWSM fails, although debug icmp trace on the FWSM demand and response shows. A the packet capture, using the NAM-2, only shows the request packets. I captured on the vlan common and FWSM port channel interface bottom of basket.

  Just to add to the confusion, if I capture in the same places, but do the ping of a PC which is in a VLAN with the interface of layer 3 defined in the 6513 which does not contain the active FWSM, that works very well, I see the request and response on the capture of vlan common, but only on demand on the capture of the port channel.

  This problem has been there since the beginning of this implementation and has not changed with IOS and FWSM software upgrades. I had this experience with all the VLANS that I tried to define the interface of layer 3 to on the switch with the active FWSM. I turned on MLS.

  If anyone has experienced this and solved, or knows what is happening, I would be grateful for any ideas.

  Thank you.

  Keith

  Keith, are you running etherchannel distributed on of your 6513?

• Vista seems to ignore the free arp packets. There are details about this problem with Vista?

  There are details about this problem with Vista?  Thks Jerry

  Hi Jerry.Smith

  You can check this link for more information:

  http://social.technet.Microsoft.com/forums/en-us/winserverPN/thread/c6cb9f57-7D5D-4B75-A79A-ff0806300fbe

  After back and let us know if it helped to solve your problem.

  Thank you and best regards,

  R uma - Microsoft technical support.

  Visit our Microsoft answers feedback Forum and let us know what you think.

• Websense and FWSM 3.1 (1): problems with very long URLS

  Hello

  in a first time the drops followed by performance of a white screen (empty).

  "longurl - truncate" and "cgi - truncate" are configured.

  The server url is configured as follows:

  "vendor websense x.x.x.x timeout 10 Protocol version 4 TCP host 8 connections.

  Requests to this url are identified as being "allowed" on the Websense server.

  Our solution is to exclude the destination address of the filtering.

  Is it possible that this problem is due to the CSCse66244bug?

  Kind regards.

  Volker

  Yes this bug is the cause. You can open a tac case and get "3.1 (3.6)" special download version. This version fixes a lot of our performance issues. Although there are a ton of websense patches a couple specific performance of websense that came out in the last month.

  Patrick

• WiFi loses connection intermittently and the erasure of the arp arranges

  This has been asked before many times, but none of the above worked for me so far.

  I have a MacBook Pro with El Capitan on it. From time to time, usually 5 to 10 minutes,

  my connection drops and I can browse the internet. As:

  4 bytes of 8.8.8.8: icmp_seq = 7646 ttl = 53 time = 13,091 ms

  64 bytes of 8.8.8.8: icmp_seq = 7647 ttl = 53 time = 17,035 ms

  64 bytes of 8.8.8.8: icmp_seq = 7648 ttl = 53 time = ms 13,716

  Request timeout for icmp_seq 7649

  Request timeout for icmp_seq 7650

  Request timeout for icmp_seq 7651

  Request timeout for icmp_seq 7652

  Request timeout for icmp_seq 7653

  Request timeout for icmp_seq 7654

  Shooting, then turn on the WiFi will fix the problem, but I tried to limit the problem

  and I discovered that deleting IP of the route in the arp table will also fix connectivity

  immediately:

  $ sudo arp d 192.168.0.1

  Request timeout for icmp_seq 7718

  Request timeout for icmp_seq 7719

  Request timeout for icmp_seq 7720

  64 bytes of 8.8.8.8: icmp_seq = 7721 ttl = 53 time = 10,947 ms

  64 bytes of 8.8.8.8: icmp_seq = 7722 ttl = time 53 = 11,966 ms

  64 bytes of 8.8.8.8: icmp_seq = 7723 ttl = 53 time = 12,576 ms

  64 bytes of 8.8.8.8: icmp_seq = 7724 ttl = time 53 = 11,058 ms

  64 bytes of 8.8.8.8: icmp_seq = 7725 ttl = 53 time = 15,173 ms

  Deactivation of unicast arp has NO had no effect either:

  $ sudo sysctl-w net.link.ether.inet.arp_unicast_lim = 0

  Notes:

  -J' have two MacBook Pro at home. Other works without problem.

  -My phone and other devices work also with the same router with no problems.

  -The problematic MacBook works with other WiFi networks without any problem.

  What could be the problem?

  Yes, clear arp fix it. Very familiar with it.

  I had this problem for 2 years and more than 2 or 3 MacBooks, on El Capitan, Yosemite, and Mavericks.   I Googled it every 1-2 years months.  I captured packets and tested several access points... The best fix so far... is the arp compensation, and I have the automated at the moment:

  in a terminal:

  While true; make sudo arp - da; sleep 2; fact

  When the window is open, every 2 seconds, my arp table gets undervalued... and if I lose connectivity, the maximum cut is 1 to 2 seconds.

  I noticed that in some places, I don't have the problem... its as if my laptop reacts badly to some other customers on the same WIFI network.  This question makes me crazy, and I can't imagine how was such years.  If I don't fix it manually, I find myself for 30-120 seconds every few minutes.

• Battery GS728TS with interfaces and the LAG problems

  Hello

  We have 2 x GS728TS (running firmware 5.3.0.26) switches connected together in a pile with double stacking cables.

  There are 4 servers connected to the battery through the LAG. Each LAG is composed of 4 members and 2 VLANS, 2 on each switch in the stack. Each server running multiple virtual machines.

  Until recently, everything worked fine. However the last week we have suddenly taken in an issue where some (not all) computer virtual on a host could not communicate with VM on other hosts and vice versa.

  After investigation, we discovered that the entries in the ARP on the troublesome VM table did not contain correct entries. Restart the virtual machine has not resolved this. so I restarted the battery and after a long period of time (15 min) the battery came and most of the questions have disappeared, but not entirely.

  So, I checked the table of addresses on the stack of the switch and found that it contains 'bad' entries as well. It shows that some have learned mac addresses are on specific interfaces instead of a lag, and also sometimes these interfaces are not even part of the specified LAG.

  If I turn off one switch and keep it turned off (or the other) then everything starts working correctly again.

  Anyone have any ideas?

  Thank you

  Shaun

  Hello

  During an extended last night maintenance window, I turned off and removed all the power to the two switches in the battery for about 5 minutes.

  I re-applied then power on both switches and after allowing then to start, check and they now seem to be working properly again.

  I just re-checked the switches (about 8 hours later) and they don't always work very well - no notice or detected problems.

  Concerning

  Shaun

• GSS108E firmware upgrade timeout - no solution using arp

  Hello

  already dug through the community and has found some clues but neither worked.

  After trying to update the firmware of 1.0.0.0 to 1.0.0.1 (after 30% a TFTP timeout occurred), the switch no longer responds. I tried to reboot several times but no way. I use the latest version of the utility 2.3.5 on Windows 10 x 64 and he finds the switch but now the update fails always after 30 seconds to prepare. I tried the arp suggested orders, but that no longer works. Also using the command netsh in Windows did not help.

  Are there other solutions? I also tried to connect directly separate full network, but also without success. Any help would be welcome avoid sending the rear switch.

  Thanks and best rehards,

  Shotokan

  I had the same problem. Finally solved.

  Open an administrator command prompt.

  Run:

  netsh interface ipv4 add neighbors 'Ethernet' 192.168.0.3 a0-63-91-89-1f-da

  Substitute the name of your connection to the network 10 'Ethernet' windows, 192.168.0.3 with the IP address of your GSS108E and a0-63-91-89-1f-da with the MAC address of your GSS108E.

  It will be useful.

  Best regards

  Lage

• R7000 + weird problem

  I just took a R7000 to replace an old Dlink DIR-655 for our company to internet hosts. It is run out of its own internet connection. Completely separate from our internet ISP LAN

  This is some weird stuff. I have internet on the R7000, everything works... almost. If I use a computer on this network of comments and access one of our websites which is hosted internally it does not (any serverice hosted internally won't work, WiFi or ethernet ports). Internet connection just directly to our router LAN - DNAT to the internal server. I can see the traffic on the LAN router, nothing is blocked. If I back the Dlink DIR-655, it works again. If I take the R7000 out of the loop and plug the separate ISP modem to direfctly, it works again. Specific to the R7000 Somerthing.

  Makes no sense, it is completely separate internet. I might as well access to tips of my internet at home. Everywhere else works, except through the R7000.

  WTF?

  ARP at the ISP Cache problem

• Are not relayed queries ARP on bridged Airport Extreme

  I have a router Xfinity and set up Airport extreme as a router jumpered to connect LAN devices on a different floor.

  Looking at network traffic, I noticed that the ARP requests are delayed or not relayed on the router bridge making it appear that these devices are offline.  These applications should get relayed?  Is there a special way to configure this option to get there?

  I used tcpdump to monitor network traffic.

  It is one of these small problems that make it difficult to use sometimes Apple routers... ARP is a problem.

  Apple recommended using the extreme double NAT... I don't like it, but you can see why.

  I recommend using static IP approach.

  Re: time capsule Airport Guard disconnection

  You sound like you know what you're doing, so it's not difficult for a person with some networks nouse.

  Post again if you find this difficult.

  One thing I added is the default domain in the Airport extreme is local and it seems never even change in bridge... I doubt that you can change the domain of the Xfinity router setting but if you can do then. Do local as well since you can not change the configuration of the router from apple.

  Finally if you still want to use the bridge... try connecting to the WAN port ethernet port LAN of the extreme... In bridge WAN is connected to the local network, but it may be less accurate in bridge, you can even set a static IP address and with the connection to the LAN port ethernet customers should get all the information directly from the Xfinity... If your extreme is the KT model... There is definitely something wrong with the extreme WAN.

• Problem with driver with Agilent 6031 A feeding

  Hello and goodmorning,

  I tried to develop my first application of cvi in which I need to use a power supply (model Agilent 6031 A). I first use direct command of GPIB and I managed to make it work, but with some difficulty, due to the fact that sometimes orders are missed.

  So I downloaded the driver from the website of OR, and I tried to implement in my code. I found a problem with the first statement, the init it. Here is my code:

  ViPSession InstrumentH;
  
  ...
  
  ...
  ...
  
  All = hp6xxxa_init ("GPIB0::5:INSTR", VI_ON, VI_ON, 1, & InstrumentH);

  After running the above code, I found in 'All' value '-1073807339 "and InstrumentH is equal to NULL."

  Any idea and advice would be much appreciated.

  P. S.

  There is a way, as in Labview, to find the explanation of the error Code?

  Found the problem. Food must be set of SCPI commands on the old controls ARP using "SYST:LANG".

• Remove the entry from the ARP table

  I need to create a program to remove an entry in the ARP table in Windows 7 with LabVIEW and TestStand.  The test that I develop contacts ESA via Ethernet.  Each HAD has the same IP address at the beginning but different MAC addresses.  I note that there may be long delays in test is running when you try to connect and remove the previous entry in the ARP table seems to help.  But now I have to do it manually through the command line.  The command 'arp d' requires elevated privileges.  I had a hard time getting LabVIEW to raise the system exec.  Does anyone have an ideas? Is there a .NET access to the ARP table?

  Thank you

  Paul

  I'll try to look into ARP sync settings setting in Windows.

  We have suffered from various problems of connection-performance TCP a few years ago and our solution was to change the default number of TCP sockets and delays (we knew port exhaustion). The tweeks eliminated most of our problems, no changes to code LV/TS not required.

  I tried to find info on ARP parameters for Windows 7, but it seems that there is much less info available that ther is for XP.

  Key words of the most common registry for older versions of Windows have been 'ArpCacheLife' and 'ArpCacheMinReferencedLife.

  EDIT:

  These parameters were apparently kidnapped in Vista. I found this on the site of $ M; they can apply to later versions, as well as M$ is a request for change to the management of the ARP...

  http://support.Microsoft.com/kb/949589