Cisco Application :: ACE Module A2(3.5) Is Dropping Packets And Closing Connection

Jul 26, 2012

I have a ACE module A2(3.5) installed, I am having a connectivity problem between two servers in my network. I have captured some traffic on different points in my network and from capture it seems like the problem is with this ACE module or somehow it is closing the connection.

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Cisco Firewall :: ASA 5505 Closing Connection?

Jun 24, 2012

I'm trying to get an asa5505 set up so that our web server can send an LDAPS login to a client's server and receive the request back. The default IP our traffic goes out on is different than where I want the connection to come back in on. So, I set a NAT rule to send all traffic from a specific inside IP out a default outside IP. I also allowed LDAPS traffic from the client's server IP address in and have nat'd it back to the appropriate inside IP address. It seems to build the outbound connection fine, but then seems to drop it right away, which then seems to not allow the response back in. I've attached a picture of the log, with (what I think are) the lines in question highlighted. I'm far from a routing expert, but this seemed like a fairly easy setup.

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Cisco WAN :: 3945e Udp Packets Are Dropping

Dec 13, 2012

I have a NAT setup. Some of my udp packets are dropping. How to find more about the NAT to find whether it missed anything or not. the router is 3945e. [code]

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Cisco VPN :: VPN To Juniper ISG 1000 Dropping Packets

Aug 1, 2012

I have ASA 5510 with 8.4 connected to ISG 1000, when traffic is passing the VPN tunnel is working fine, when the traffic stops, ASA will drop the packet but the VPN tunnel on ISG still up .When new traffic started from ISG side, it will drop, as the tunnel is not up on ASA side.

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Cisco Firewall :: ASA5505 Dropping Packets

Apr 30, 2013

I am  having an issue where the ASA is dropping packets on the vlan  interfaces. I have it as a dedicated router/firewall for a 100mb connection .
 
Vlan1 is the internal networkVlan2 is the network to cable modem
 
Eth 0/1 is connected to a 2960G switch with hard coded 100mb Full  Duplex at each end, this is the inside interface. Eth 0/0 is the  connection to the cable modem, this is the outside interface, set at  auto at both ends.
 
Im getting on the vlans eg. 51253 packets dropped however network  traffic isnt impacted and everything runs fine, as well as 46532 switch  ingress policy drops.
 
Example;
 
ciscoasa# sh int vlan1Interface Vlan1 "inside", is up, line protocol is up Hardware is EtherSVI, BW 100 Mbps, DLY 100 usec MAC address 70ca.9b36.ab80, MTU 1500 IP address 10.x.x.x, subnet mask 255.255.255.0 Traffic Statistics for "inside": 43250588

[Code]......

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Cisco WAN :: 800 Router Dropping SMTP Packets

May 29, 2012

We have a cisco 800 series router between the internal network and the WAN. the problem is we are unable to receive some of our mail due to dropped packets by our router. the conversation between the two servers stops at the point were our server responds with the command 250 2.1.5 user@mydomain.com | 354 Start mail input; end with . i was able to trace the packet, using Packet Export, on the internal interface but not on the external interface. Also i have noticed that the external interface has about 160,000 unknown protocol drops while the internal interface has 0.

Is there anyway to find out way the external interface is dropping the packets.

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Cisco Switches :: SG300 Is Dropping Packets?

Apr 10, 2012

We have a customer who we sent to Cisco to replace some aging Dell switches. They purchased 5 SG300-52’s for 2 different networks. Their production LAN has 2 “live” switches and 1 spare. The 2nd, a development LAN has 1 switch and 1 spare. Their primary production SG300-52 has GE1-8 VLAN’d off as VLAN2 for public IPs. The untrusted (WAN) interfaces of 2 x ASA-5510’s, 1 x ASA-5505, and 2 x RV082 v2’s are connected to GE2-6. GE1 is the uplink to the co-location center’s Cisco switches. GE7 & 8 are spare ports. Each SG and device port is hard coded for 100/Full.
 
One of the ASA-5510’s and the ASA-5505 maintain a site-to-site VPN (the development LAN used to be in a different facility hence the VPN). Recently the developers have stated the performance is horrible. I noticed ping traffic loss from PCs on the dev side to servers on the production side in the order of 20-30%. I assumed it was a VPN issue so I opened a ticket with Enterprise TAC (all the ASAs and the SGs have either SmartNet or extended support contracts). TAC determined the problem happened even if you ping from inside the ASA to the untrusted side of the other ASA thus eliminating the VPN as the culprit.
 
The 2nd ASA-5510 has the AIP module and was not even live until this weekend. Turning it up and giving it a basic config returned the same results. #ping x.x.x.x repeat 100 will drop 20-40 packets. I have no security enabled on the SGs and even tried using the spare SG300-52 this weekend in place of their primary with the same result. I’m to the point of returning one of the Dell switches to production, but this cannot be a good sign. I’m also a bit frustrated that I’ve yet to figure out how to get Cisco Enterprise to speak with Cisco Small Business on this. The customer has over $10k invested in Cisco equipment and Cisco isn’t jumping in to figure this out.
 
The latest rep wants a packet capture from the SG300’s VLAN2 but there are no PCs there to do this with and the manual doesn’t even talk about doing this. How we can do this as well as get the 2 divisions working together to fix this? BTW, the RV082’s exhibit the SAME exact problem. I can ping from ANY device on VLAN2 to any other device and drop packets. Copying a simple 1MB file over the VPN can take minutes where it should take 1 second. I can reproduce this for 24/7.

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Cisco Firewall :: ASA 8.2.4(4) Seems To Be Dropping Valid TCP SYN Packets?

Feb 28, 2012

We have a setup with a MS-TMG - ASA (8.2.4(4) in routing mode) - (internal) Router - FWSM - Router - Exchange with NLB.  We have now the problem that IMAPS is not really working through this setup. It works from internal (without ASA and TMG inbetween), but not reliably through the internet. There is a rule on the ASA which permits the ports from the TMG to the Exchange NLB address.We opened a case with Microsoft and they told us that not all tcp-syn packets are received by the Exchange server which were sent by the TMG.Thus I sniffed on the ASA with a packet capture and indeed, a lot of syn packets were on the interface to the TMG, but not anymore on the interface to the internal router.This ASA also filters all other internet<->company traffic, so there's a lot of stuff running.
 
Maybe it's dropped in the ASP, or is the capture maybe not valid?Here the show asp drop:

ASA01-Internet# sh asp drop
Frame drop:  Invalid TCP Length (invalid-tcp-hdr-length)                                  1  Reverse-path verify failed (rpf-violated)                                  319  Flow is denied by configured rule (acl-drop)                            477077  First TCP packet not SYN (tcp-not-syn)                                   10212  TCP data send after FIN (tcp-data-past-fin)                                 41  TCP failed 3 way handshake (tcp-3whs-failed)                               824  TCP RST/FIN out of order (tcp-rstfin-ooo)                                 1419  TCP SEQ in SYN/SYNACK invalid (tcp-seq-syn-diff)                             6  TCP SYNACK on established conn (tcp-synack-ooo)                              1  TCP packet SEQ past window (tcp-seq-past-win)                              821  TCP invalid ACK

[code]....

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Cisco Routers :: RV082 Dropping Packets?

Feb 14, 2013

It appears we might have an issue with our RV082 (v4.2.1.02) dropping packets during the teardown of many TCP conversations.  I have attached two packet captures of what I believe is the same conversation.  One is from outside the router (Wireshark using an Ethernet Tap) and the other is from the client inside the router (SLES11SP2 running TCPDump).  These are both very small captures 9 packets and 18 packets and I'm hoping it will identify the problem.
 
It appears that the RV082 is prematurely closing the natted port used to communicate with the host outside the network.  The host sends a FIN, ACK packet, to which the client responds with an ACK,  However, when the client then sends his FIN,ACK sequence, it never makes it outside the router.  The client sends a total of 9 FIN,ACKs trying to contact the outside server, but none of those appear to make it through the router.
 
Is the router slamming the door prematurely?  (I've been fighting with this problem for 3 weeks now!)
 
Inside Capture:
----------------------
No.     Time                       Source                Destination           Protocol Length Info
1 2013-02-13 19:32:37.827942 192.168.1.45          38.113.116.214        TCP      76     35975 > http [SYN] Seq=0 Win=14600 Len=0 MSS=1460 SACK_PERM=1 TSval=635644783 TSecr=0 WS=128

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Cisco VPN :: Srp527 VPN Tunnel Dropping Packets Intermittently

Dec 12, 2012

We have a Cisco ASA and recently purchased a cisco small business srp527 router.  It is connected to our ADSL2 connection and is working fine.  I have configured the device with an ipsec tunnel using an ike profile and the tunnel is created successfully with packets traversing the tunnel.  However packets are being dropped intermittently, with no cause.  The link is currently not being utilised, there is no load on the network however when I ping Google and any address subject to the rules of the tunnel i notice that a single packet is dropped every now and then.

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Cisco WAN :: 1811- MTU 1500 - Router Dropping Certain Packets

Dec 15, 2011

I seem to be having an issue where certain very packets are being dropped/lost by my office router. The reproducible situation is, when I attempt a DNS zone transfer from my linux bind DNS server (A.A.A.A) to any server on my network behind NAT (Y.Y.Y.Y) the first packet (Seq 1) of the response is lost. The client making the query asks for first packet (Seq 1) to be resent, and the DNS server attempts to resend it repeatedly, but those are lost too.

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Cisco Switching/Routing :: Why C2960 Is Dropping Packets

Dec 26, 2012

We have a customer who uses about 20 x c2960's switches for access layer and 2 x c3560e for distribution layer. C2960's uses C2960-LANLITEK9-M , Version 12.2(58)SE1. Everything was working fine. Now we got information, that sometimes there are problems with connectivity. Customer tries to reach internet.
 
SW11#sh int fa0/18       
FastEthernet0/18 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is e8ba.806a.4412 (bia e8ba.806a.4412)

[Code].....

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Cisco WAN :: Dropping Scavenger Packets On ASR 9000 During Congestion

Aug 6, 2012

I am trying to find a solution using modular QOS when there is congestion in circuit we drop packets with WRED which are marked with a DSCP value of say AF21. I can drop those traffic completely in case of congestion.  I was thinking to allocate 100% bandiwth to rest of the traffic.

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Cisco Firewall :: 871 - Default Class Map Is Dropping All Packets

Aug 21, 2012

I have a Cisco 871 router that used to have Access list based security. now I am trying the ZBFW for the first time.  I thought I had a pretty good program until I found all my traffic was getting dropped. This is my first stab at ZBFWs and I am a bit confused esp with the default class part.
 
The router is for my house and thus also has to have priority for gaming. I will add the gaming and voice QOS once I get it working,
 
Guest VLAN has access to 2 IP's in Data for printing. Cisco871#sh run

Building configuration...
  
Current configuration : 8005 bytes
!
version 12.4
no service pad

[Code].....

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D-Link DIR-655 :: Dropping Packets While Gaming On Computer

Mar 27, 2012

I bought a DIR-655 a less than a year ago on amazon, and it was working great up until about 4 weeks ago. Ive noticed that it has been dropping alot of packets while I am gaming on my computer. I would run about 95-98 ping usually and now it jitters every 5-10 mins or so from 95-98 to up to 500. It is really troublesome during games and I dont know what to do. Ive tried disabling QoS and still nothing. I run on wireless G and N with auto 20/40 mhz. Standard WPA(personal) and it was running absolutely great until now. I know its the wireless because I have hardwired it into my laptop, both from the router and just the modem itself with no problems whatsoever. I dont know what to do about it.

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Cisco Application :: ACE RST Packets With 6509

Aug 15, 2012

I have ACE10 Module in my switch core 6509, my context "Proxy" was criated for balance connections to Forefront TMG Servers, this balance needs original client IP Address connections end to end in the solution.
 
My problem is: The clients are complaining of slowness connection to the internet, i captured the traffic in the ace capture feature and i see some RST packets and severals checksum error packets in pcap file.
 
The topology is:
 
Client -> ACE VIP VLAN 81 -> RSERVERS VLAN 80
 
Vlan 80 is in L2 mode(no interface vlan in the switch core 6509, route occurs through the ace appliance).
The IP address 10.96.200.6 is the gw for rservers.
[Code]...

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Cisco Firewall :: ASA5540 Dropping Packets On Large FTP Transfer

May 23, 2011

I am attempting to FTP to a remote site through a IPSEC tunnel.When I am transfering large files the ASA5540 is showing syslog errors stating "connection timeout".  What I think is happening is after about 1 hour the firewall is closing the connection control port for the FTP session and neither end is notified so eventually the transfer is stopped.What do I need to modify in the FW to accommodate these larger files?

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Cisco Firewall :: 5510 Inspect SIP Dropping Request Message Packets

Mar 17, 2011

I have 2 ASA 5510 firewalls at 2 different sites. Both running on version 8.0.4. Users are using an Instant Messaging type of application provided by a local telco here which is able to send and receive SMS using SIP (from the packet capture that I've done).
 
When users use the IM in site A, they are able to send and receive text messages via the IM from behind the firewall. However, when the users are in site B, users are able to send out text messages but not able to receive them.
 
I noticed that when I remove "inspect sip" from site-B's global policy map, users from site-B can successfully receive text messages. I have confirmed that it is the firewall that drops the packets as I have captured the inside and outside interfaces of site-B's ASA and I can see the incoming sip "request: MESSAGE" packet on the outside interface but I do not see the packet exiting the inside interface.
 
I have cross check both firewall configurations, and I do not see anything suspicious commands relating to sip that might cause this issue. Is there any command to troubleshoot why the sip inspection is dropping the sip packets on site-B?

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Linksys Wireless Router :: E3000 Dropping Packets On Any Channel But 1

Jul 24, 2012

My E3000 has about 60% packet loss if the channel selected is anything other than 1.  I can't enable 5GHz or even 40mhz 2.4GHz channels without dropping 60% packets.

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Cisco Switching/Routing :: X4648-rj45V+E Module Not Forwarding Frames / Packets In 4507E Switch?

Mar 26, 2012

I have a problem with x4648-rj45V+E module, which is not forwarding frames/packets in my 4507E switch. I have done the diagnostic and the module test is passed. When i try to ping from one PC to another in the flat network, icmp is not forwarding. Even i cannot see the mac addresses in the mac address-table. But i can ping to my management port in the sup module?

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Cisco Switching/Routing :: 3750v2 DHCP Snooping Not Working Dropping Packets

Jan 9, 2013

I recently installed DHCP snooping on a 3750v2 switch (Version 12.2(55)SE4) and configured the uplink(Po2) as a trusted port. The problem is that clients cannot receive an IP address. When I disable DHCP snooping it is working properly. DHCP snooping is configured correctly but I don't have an idea how to resolve it. [code]I tested the solution on the same kind of hardware switch and firmware and it worked out fine. What is causing the clients not to receive an IP address from the DHCP server?

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Cisco Switching/Routing :: 3750X Switches Dropping Packets On Uplink Interface?

May 9, 2013

We have a remote site that is using 3750X switches as layer 2 switches back to our home site.  The uplink port is showing dropped packets but the utilization on the link is never about 10%.  We have a 100Mb circuit to this site.  Our speed tests and iperf tests are not showing any issues that we can see.  However the port is still droping packets.  It is not dropping at a high rate but they are dropping.          
  
switch#sh platform port-asic stats drop gi1/1/4
  Interface Gi1/1/4 TxQueue Drop Statistics    Queue 0      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 1      Weight 0 Frames 52876      Weight 1 Frames 2      Weight 2 Frames 0    Queue 2      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 3      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 1330874    Queue 4      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 5      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 6      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 7      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0switch#
         
Is there a way to capture these dropped packets to see what they are?  We do have VOIP phones at the site and are using Qos.

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Cisco WAN :: 3750 And 4507 / 1Gbps Link / Sweep Ping Dropping Packets?

Dec 29, 2010

We are testing a new 1Gbps WAN circuit between 2 sites. We have cisco 3750 and 4507 on each end. Every time we run extended ping sweep ranging from 36 to 18024 bytes the packets are being dropped randomly once the size goes above 1500 bytes. Our ISP claims Demark to Demark test are clean and they don't want to acknowledge the problem, they blame our switches. To prove the problem is not on our end we've put different switches at each end, still facing the same issue. Ping success rate is around 98 to 99 percent.

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Linksys Wireless Router :: WRT120n Dropping Incoming Fragmented IP Packets?

Oct 13, 2011

I am trying to use my WRT120n as access device  for an IP Centrex service using SIP protocol. My SIP phone is located right behind the router.My problem is sometimes the router is dropping incoming calls because signalling packets are fragmented at IP level. So I cannot receive those calls.Is there a way to enable the router to accept these packets?

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Cisco Application :: Monitor TPS Value For ACE-SSL-05K-K9 Module

Sep 1, 2011

I recently installed the license ACE-SSL-05K-K9  on ACE10 with multicontext solution.The license provides 5000 Maximum number of SSL transactions per second (TPS).The customer would like to track this to find out the correct size and in the case of services https upgrade licenses.Can I do it so through particular output or it's necessary monitoring with snmp service? In the second case, can you tell me the oid string to use?
 
In case the module should receive a higher number of connections to that provided by the license, what's the issue for new https connections?

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Cisco Application :: ACE 3.0 Module URI Rewriting?

Feb 16, 2010

We are using a Ace module running version 3.0?We do have a service which can now be reached by a url like https://www.xxx.com/yyy/ < notice the last /This is running via the Ace which terminates SSL and so on..
 
So now our client wants an url like  https://www.yyy.com . The backend realservers and place of virtual dirs on IIS stays the same.

So now /yyy/ needs to be added to the backend realserver request, so the correct virtual dir is used. Therfore I need to add this Uri towards the realserver.

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Cisco Application :: CSS11503 SAM Module On 99% Utilization

Jul 27, 2012

CSS11503 that has a SAM module having a 99-100% utilization. Can this affect the services if both the accelerator module cpu peak to 99%.
 
Kindly see below logs:
 
LPHGT11# show system-resources
System Resources for 1/1:
Installed Memory:   268,435,456 (256 MB)

[Code].....

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Cisco Application :: ACE 30 Module Configured For 250 Context?

Mar 28, 2012

I Just deployed some of these new modules and running A4.x code. How to configure an ACE with the maximum context?
 
We run in tranparrent mode with 110 Contexts, we found that with a base config for each context(80 lines of code) this would only leave us with 7% of available RAM. The Device begins to shut down services @ 5%.  like SSH and others.
  
So, Is this even possible to configure 250 contexts and still manage the device.

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Cisco Application :: ACE-20 Module - Automated Backup Of Configuration

Feb 4, 2010

I am currently stuck to setup an automated configuration backup for ACE Blades. I found a script to backup the ACE from the Cisco ANM box but unfortunately I am not very familiar with Linux. (script) in place, to "pull" the ACE config from a Microsoft system ?
 
System State:
ACE IOS A2.(1).5

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Cisco Application :: ACE20 Module Upgrade Performance

Jun 28, 2011

I have a ACE20 module with a performance of 4 Gbps. I want to upgrade the performance from 4 Gbps to 8 Gbps. Is correct the following SKU for the upgrade?

ACE30-UPG-08-K9=ACE10 or ACE20 to ACE30 Upgrade for 8 Gbps   Throughput 

And if i want to upgrade the performance to 16Gbps is correct the sku?
 
ACE30-UPG-16-K9=ACE10 or ACE20 to ACE30 Upgrade for 16 Gbps   Throughput 

I noticed that the price list of both codes is the same....
 
Is it right for the SKUs listed I get the new module with the performance ACE30 requested?

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Cisco Application :: ACE-20 Module In Bridged Mode With Client NAT

Apr 15, 2012

Whatever a NAT is supported for ACE-20 module? I do need to convert working CSM(SLB) config to ACE configuration and I am not quite sure if the configuration below is correct. ACE module should be configured in bridge mode with two vlans - vlan 36 (client) and vlan 436 (server) - bridged with interface bvi 36. NAT on ACE configurad as "nat dynamic 1025 vlan 436" into corresponding "policy-map type loadbalance". Check two parts of configs and if the ACE config is properly converted from CSM and will be working in the same way (especialy for NAT). [code]

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Cisco Application :: Ace20-MOD-K9 Cookie Persistency On Ace Module

Sep 5, 2012

I have an ACE20-MOD-K9 with version  A2_3_6a, and i am having problems in cookie persistency. the setup contains 4 servers using round-robin algorithm and cookie persistency and that receive http traffic on port 9090. I have been receiving complains that the users are getting disconnected randomly while accessing the web application through ACE. Below is part of the config, when setting the timeout of the cookie to default or something equal to hours, the disconnection/complains gets worse.

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Cisco Application :: Keep Alive Limitations On ACE 4710 And Module

Oct 20, 2011

I wanted to find out how many times can I apply a healthcheck in a single context. I have 50 farms that are using the same port and instead of creating 50 different healthchecks, I want to just create 1 healthcheck for the 50 farms and apply it to each farm. I also need to know if the same limitations (whatever they may be) is the same for the 4710, ACE20 and ACE30.

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