Cisco WAN :: 1760 - Packet Drops In Serial Interface
Feb 11, 2013
We have a Cisco 1760 router . We are facing sevier packet drops in the serial interface.
When i swap the router with another router link is working working fine.
Troubleshooting steps taken
1. Swap the serial cable with another working cable : no change in state
2. Reconfigure the encapsulation commands (with PPP and HDLC) : no change in state
3. Try with a decreased MTU packet Ping : no change in state
4. Decreased the Input queue and increased the output queue size using hold-queue in command : Comparatively the packet drop is reducing but still a 10 percent drop is happening.
View 1 Replies
ADVERTISEMENT
Jan 30, 2012
MIB OID and the values.also i want to know the values og output packet and output packet drops MIB OID values of POS interface on GSR router (12000).because i am getting many output packet drops on these pos interface.how do i get these values from the router.
View 1 Replies
View Related
Sep 6, 2012
Class and Policy maps are defined properly but when I am going to apply the policy-map on interface ,throwing an error as "'set' command is not supported in a 2nd level policymap".
Class/Policy map configuration given below ....
class-map match-any cm_traffic_control
match access-group name acl_traffic_control
class-map match-any BE
match access-group name be
[Code] ....
View 8 Replies
View Related
Sep 7, 2011
IP Address : 192.168.1.0 /24
I need 50 hosts
I need to subnet for f 0/0 and s 0/0
I know for f 0/0 its 192.168.1.1 /26, but after hours and hours i can't seem how to subnet for the s 0/0
View 2 Replies
View Related
Apr 28, 2012
I have a remote site that still utilizes a single T1 connection to me. For multiple reasons we had to scrap the old T1 and have a new one put in. The old T1 resided on a T3 as channel 25. The new T1 is a standlone point to point. I removed the old config from my 7301 and programmed my 3725. I cannot figure out what is going on but the interface stays down/down. There is no loopback turned on, either manually or by the carrier. The AL LED stays amber regardless of whether or not I have a cable patched down. The CD LED remains green when I patch a cable down. LP is not light.I am using a straight through Ethernet cable to connect my 3725 to the smart jack. If you look at the show output below you will see DCD and CTS is down. Since the remote end was working and I just had the tech move the patch cable from one smart jack to another I am assuming the problem is on my side or with the carrierI already tried changing the clock sourced between internal and line. I also swapped out the WIC card for another one. I don't usually program T1 connections. [code]
View 5 Replies
View Related
Feb 28, 2012
I need topics on wireless network packet drops and how to improve the network on wireless lan
View 1 Replies
View Related
Mar 4, 2012
Is it possible to simulate ISDN in a lab using a serial or ethernet interface. I want to setup FR and have ISDN running between a couple of routers with DoD routing.
View 6 Replies
View Related
Feb 24, 2013
What would cause an interface to show up/up (looped), but you still can't ping that loop?...It is on a Cisco 7613 with an Enhanced FlexWan (WS-X6582- 2PA), with a Mx Serial PA, 8 ports (73-1580-10) and running IOS ver 12.2(33)SRE2 [code]
View 5 Replies
View Related
May 16, 2013
I'm having an issue that I can't quite understand. I set up a test lab to get familiar with EIGRP routing. I have a Cisco 3845-MB with 2 VWIC2-2MFT-T1/E1 cards.sh ip int brief shows UP UP status on all serial ports. I gave it an IP address but I'm having trouble pinging the serial interface IP. It's dropping pings to its own S 1/1/0 interface when pinging from console. I have known good T1 crossover cables 1&2 - 4&5.
Here is the "ip int brief" from 3845-MB
3845-MB#sh ip int brief
Interface IP-Address OK? Method Status Prot
ocol
GigabitEthernet0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/1 172.30.2.1 YES NVRAM up up
Serial1/1/0:0 10.3.29.2 YES manual up up
Right now it's pinging itself at about 60 -90% success rate... and I can't figure out why it's dropping any packets at all. I have other issues with in the lab as well... but i think this might be my "core" issue.To make matters even more "weird" I've tried two different VWIC2-2MFT-T1/E1 cards and I drop pings with both of them.
Here is a sh run and a sh diag:
3845-MB#sh run
Building configuration...
Current configuration : 1434 bytes
!
version 12.4
service timestamps debug datetime msec
[code].....
View 4 Replies
View Related
Sep 18, 2012
I just recently bought a new Cisco 2611 for my home lab and am having trouble getting the serial port to work. I have tried multiple things such as erase startup, switching the cables to rule them out, and even changing IP addresses but none worked. [code]
View 1 Replies
View Related
Jun 13, 2011
it's possible to retrieve Tengig interface serial numbers via CLI? We have a couple of them in 3750 switches, and we need them for our inventory.
View 1 Replies
View Related
Apr 29, 2012
I am trying to use the connected WIC2-2MFT, as the servial interface on my cisco 1841.But it does not show me the option, under configuration interface
[code] What should I do to make this enable on this list?I am attaching the show tech-support, and show version of this device.
View 5 Replies
View Related
Apr 2, 2013
We are having 1262 Access point model and we are getting packet drops when 20 users are connected and users do Video streaming and buffering online.
Even our AD IP address also getting packet drops during the users are connected and using youtube or someother video sites.
View 11 Replies
View Related
Mar 15, 2013
I'm trying to troubleshoot a random packet drop issue for an IPSec tunnel between two VTIs. For over a month, we didn't see any issue, and starting today, we have up to 30% packet loss across an IPSec tunnel.
After some analysis, I concluded that the packet loss happens somewhere on the path from the uc520 to the 2921. Packet counts show up correctly on the uc520 physical egress interface, but the packet count is low on the ingress interface on the 2921.
Pings outside the tunnel along the same path are fine.
I also cleared the tunnels on both ends and after they reestablished, the issue was still present.
Any pointers on finding where the packets get lost?
rr-hq-2921#ping 10.1.13.1 source g0/1 rep 100
Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 10.1.13.1, timeout is 2 seconds:
[Code].....
View 3 Replies
View Related
Mar 26, 2012
I have existing cisco 2811 (Version 12.4(3c)). I try to add a HWIC serial card into the router but the new HWIC is not detected. There is no new interfece shows up when i do show run. This HWIC is a new card just bought it.
View 7 Replies
View Related
Oct 22, 2012
While I managed to connect to each router individually, I decided it was time to connect the routers together via serial; as I don't have any serial cables and need to buy some, what serial cables I need, as well as to ask whether I have the right cards in my router(s) that will allow me to do so.
I bought 3 1841 routers, and all have a 1 port serial WAN Interface Card (WIC 1-T); one router has 2 of these, and one router has a WIC-1B-S/T .. My question is, can I connect the routers with a serial cable via WIC 1-T, or do I need a 2-T
View 1 Replies
View Related
Mar 9, 2013
I can see drops on the 6509 Queue for interface gi1/6 , qos is disabled globaly with qos disabled all packets are in one Queue using best effort my question is if I can see drops using the sh queueing int Gi1/6 command why I am not seeing any drops when I run the Sh int (interface number ) command. [code]
View 7 Replies
View Related
Oct 29, 2012
On several calls i noticed that the outgoing audio stops for 5..15 seconds randomly. I'd say it happens on an average of every 5 minutes.
When this happens, i can see that the value after "Call1 Packet error:" increases by one. Why just a wrong packet may stop the outgoing audio for so long? i've much more packet losts (about 3%) but they give me no problem at all.
Since a little and cheaper Handytone HT502 gave me intermittent audio too, but the effect was much better (audio still stops, but in a second it comes back), i wonder if is there something i can do by tweaking the WRP400 settings, I'm still using firmware 1.01.00.
View 7 Replies
View Related
Nov 30, 2011
We are facing issue related to STP.I am getting MAC FLAP error on Cisco 4510 switch. The effect on network is intermittent Pkt drops in the network. When I checked the specific Ip address I am getting the same with two different. [code] Vlan is created on CORE switch and assign priority 0 than CORE switch should be the Root. but instead Root port is becoming the port where server is connected. Server at last connected to CORE switch via HP switch via other Vlan to CORE switch and creating a loop as shown in Diag. [code] The Priority of Vlan 102 is changed and Root port has been changed due to that. The Bridge ID is the same as CORE switch.
View 7 Replies
View Related
Dec 21, 2011
Have a pair of 2960's in a stack, one port(trunk) connects to another DC and we are seeing ~5% packet-loss and large output drops to this DC.
#sh interfaces gigabitEthernet 1/0/17 counters errors
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Gi1/0/17 0 0 0 0 0 182867
GigabitEthernet1/0/17 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is a0cf.5b87.ec11 (bia a0cf.5b87.ec11)
Description: QinQ_to_DC2
[code]....
As you can see, 30sec rate isnt excessive, but as the drops are outdiscards it would appear we are getting hit by the small buffers/microburst issue.
Gi1/0/17 is mapped to asic 0/20
Gi1/0/17 17 17 17 0/20 1 17 17 local Yes Yes
View 15 Replies
View Related
Feb 21, 2012
I have two 1410 bridges installed in a point to point link using external directional antennas. The distance between the bridges is only 200M. As you can see below from the output the RSSI and SNR are excellent with a good fade margin available. These stats are almost identical to what my path profile calculated out to be. During normal operation the latency on this link sub 2ms, during certain conditions the latency jumps to 40+ms and starts dropping packets. I say certain conditions because we have not been able to pinpoint it. Unfortunately at this time the customer does not have the ability to do any SNMP polling or collect any statistical information (working on getting this setup). There are an excessive number of data retries and am not sure if that is normal. During the issues I have observered the below command output and the numbers did not change, which leads to me believe that it is not a RF issue. It almost looks like it's serialization delay, but I have no data to back that up. During iperf performance testing of this wireless link I could push 54Mbps of UDP traffic no problem, no errors, no CRC's.
Bridge Parameters
Encryption: WPA-PSK w/TKIP
Distance parameter: Configured to 1
[Code].....
View 4 Replies
View Related
Nov 1, 2011
I just finished setting up a bundle of (2) T1's in a multilink bundle and I'm having issues with one of the T1's not wanting to join the bundle.
The router I'm using on the remote office location is a 3620 router running code c3620-i-mz.121-1c.bin
The campus router which is a 7206 is setup the same exact way with multilink 240 and like I've said, serial 0/0 is joined to the bundle just fine, so we are running off one T1 connection.
The serial interface that is not working is: serial 0/1
Here is a show-run:
interface Multilink240
ip address 172.18.xxx.xxx 255.255.255.252
ip route-cache flow
ip ospf network point-to-point
service-policy output PhonesFirst
ppp multilink
[code].....
View 3 Replies
View Related
Mar 5, 2013
our C3750 like the one described here [URL]
We have the port on the switch set like this:
switchport port-security maximum 25
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
In case a device connected to the port is inactive for more than 2 minues ( aging time ) the first frame/packet the device generates arrives to the port on the switch, but the switch does not forward it to the appropriate port ( discards it or whatever ).
So far I tested on
1 30 WS-C3750E-24PD 15.0(2)SE2 C3750E-IPBASEK9-M
2 30 WS-C3750E-24PD 15.0(2)SE2 C3750E-IPBASEK9-M
3 52 WS-C3750G-48PS 15.0(2)SE2 C3750-IPBASEK9-M
[Code].....
When we remove port security from the port, it works perfectly fine, as expected.
It seems this is not HW or IOS version related. It seems it is not a stack synchronization issue, it does not matter if a device is connected to the first or other stack member. I tested on C3560 too, here there are no problems, so seems it is 3750 related.
View 1 Replies
View Related
Oct 27, 2011
I had all kinds of packet loss and I was ofcourse suspecting my ISP. But then I tested pinging my internal interface and found that it has packet loss as well. I have about 10% packetloss to my interface with 192.168.0.254, I have the same thing from several different inside hosts. My inside rule is the implicit one, any, any. service IP.In the log I can see a teardown and build of the icmp whenever the packet loss accour.There is no packet loss pinging the outside interface from the internet.
View 3 Replies
View Related
Mar 25, 2013
I have a 2911 router connected to two different ISP. Is it posible to route traffic based on what interface the traffic came first?Lets say I have the deault route to use interface gig0/0(ISP1), but a certain ip packet reach the router by interface gig0/1(ISP2). Is there any way (if possible without using source NAT) that I could route traffic back to that ip address using interface gig0/1. The source Ip addresses are not fixed, so I can not use Policy Based Routing.
View 1 Replies
View Related
Jul 5, 2012
I have a ASA5540 firewall set-up with an interface MTU of 1500.
I suspect that we are receiving packets with a larger MTU but have not found an easy way of confirming this. Any command that can be run on the firewall to display the MTU packet size being received on an interface?
We are also running Solar Winds so could query an OID if such a variable exists.
View 1 Replies
View Related
Oct 24, 2012
I am doing some per-deployment testing with a ASA5585X and noticed that when I feed it a stream of SYN packets on the outside interface the measured traffic rate on the inside interface going out is about 10x the rate of the outside interface going in.
laptop --- ASA --- PC
I send 6k TCP SYN pkt at interface rate from the laptop targeted at PC. No packets are dropped by Ac Ls or policies and can be sniffed at the PC.
Show interface commands show:
sh int inside:
... ...
Traffic Statistics for "inside":
...
1 minute input rate 23 pkt/sec, 1303 bytes/sec
1 minute output rate 4454 pkt/sec, 820757 bytes/sec
sh int outside:
... ...
Traffic Statistics for "outside":
...
1 minute input rate 885 pkt/sec, 70847 bytes/sec
1 minute output rate 7 pkt/sec, 425 bytes/sec
I would expect that if 885 pkt/sec enter the firewall on the outside interface the same amount or less would exit it on the inside...? Why this is not the case? The packet rate is about 5x and the data rate is about 10x greater.
View 6 Replies
View Related
Apr 25, 2013
We're seeing a strange issue with a Cisco 819 that we're testing out. We are able to ping out over the Cellular interface just fine, but as soon as we plug a device into one of the FastEthernet ports we immediately drop the cell connection. The Cell interface then continues to bounce until we unplug the device. We are intending to setup a VPN tunnel, but we've even stripped all that out for the sake of troubleshooting.
Current configuration : 2832 bytes
!
version 15.2
[Code].....
View 1 Replies
View Related
May 14, 2012
I have cisco 887M-K9 router and I can see output drops are increasing on ATM interface. [code]
View 9 Replies
View Related
Feb 6, 2012
I'm troubleshooting interface drops. However the output of the following show commands don't match number of drops. Based on the output, can you find out what is causing the drops? the G1/0/28 is the uplink. Is that just the port got overrun by the traffic?
#show int g1/0/28
GigabitEthernet1/0/28 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0019.5667.191c (bia 0019.5667.191c)
[Code].....
View 7 Replies
View Related
Apr 6, 2011
I have a pair of 5505's in transparent mode and connected them to C2960S. The inside interface (which is VLAN5 on the switchport) keeps dropping, going in to error state. There is no log reference in the switch and the interface shows as UP. The standby ASA has no problem, both interfaces on the switch is up. As soon as I failover the units over, the active node inside interfaces drops.
View 2 Replies
View Related
Dec 6, 2011
Vlan interface would be dropping packets on the input queue? Refer to the drops/flushes below. This is from a 6500 with a Sup720, there are a number of vlans on it. This 6500 and it's HSRP partner are exhibiting the same symptoms on all the vlans I bothered to check. This particular vlan is quite lightly used, there are only about fifteen user PC's (each with 100 Mb interfaces) on it.
There is a bit of information on input queue drops on Cisco, but this is focused on physical interfaces where I can understand some packets being dropped. I would think that Vlan interfaces would have different issues.I note the "no buffer" errors as well, that also concerns me, especially as that counter is quite close to the "flushes".
Vlan123 is up, line protocol is up Hardware is EtherSVI, address is 00d0.04fd.6000 (bia 00d0.04fd.6000) Description: Vlan123 Internet address is 10.123.123.7/24 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not supported ARP type: ARPA, ARP Timeout 04:00:00
[Code] .......
View 3 Replies
View Related
Mar 13, 2012
I have too much output drops in my cisco 7206 VxR NPE G1 router. I'm doing dot1Q on this interface and is connected to switch , i changed the router and IOS but still the error is same . What can be the reason . The interface on switch and router are 1000/Full and i changed the cable also . The traffic only comes about max70Mbps and it is really confusing. [code]
View 9 Replies
View Related
