Slow ARP response for dial-in clients

I’ve been experiencing an intermittent issue with remote PC’s connecting to a Cisco AS5350 Universal Gateway - basically, a RAS server.
The issue as far as I’ve been able to pinpoint seems to be related to the amount of time it takes the dial-in client to register an ARP entry on the local network where the RAS server and other servers are connected.   If I start an extend ping to one of the servers on the local network (not to the RAS server) once my dial-up connection has been established, I typically see anywhere between 3 and 18 ICMP request timeouts before I start receiving replies. And if at the same time I start an extended ping to the IP address of the RAS server, ICMP replies are received immediately with no request timeouts.
Topology:
Dial-in Client <===> AS5350 RAS <===> L2 Switch <===> Server
192.168.240.131         240.5                           240.1               240.21
The switch that the AS5350 and the servers are connected to is a WS-C2960G-8TC-L layer-2 switch with a very basic config. Basically they only thing I’ve changed during the course of my troubleshooting is the STP mode, STP forward time and to enabled STP portfast on the uplinks to the AS5350 and the server… see configuration below:
Current configuration : 2721 bytes
version 12.2
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
hostname Switch
boot-start-marker
boot-end-marker
no aaa new-model
system mtu routing 1500
spanning-tree mode rapid-pvst
spanning-tree extend system-id
spanning-tree vlan 1 forward-time 5
vlan internal allocation policy ascending
interface GigabitEthernet0/1
description Uplink to Server
spanning-tree portfast
interface GigabitEthernet0/2
description Uplink to CLE-AS5350 RAS
speed 100
duplex full
spanning-tree portfast
interface GigabitEthernet0/3
interface GigabitEthernet0/4
interface GigabitEthernet0/5
interface GigabitEthernet0/6
interface GigabitEthernet0/7
interface GigabitEthernet0/8
interface Vlan1
ip address 192.168.240.1 255.255.255.0
ip http server
ip http secure-server
line con 0
exec-timeout 0 0
logging synchronous
line vty 0 4
login
line vty 5 15
login
end
For troubleshooting, I enabled “debug arp” on the switch and attempted a dial-up connection to the AS5350. Once the call was established and I received a DHCP lease (192.168.240.131), I started an extended ping to a server (192.168.240.21) on the network… see below:
Host Details:
192.168.240.1 (b4e9.b006.9e40) = Vlan1 on L2 switch.
192.168.240.21 (5cf9.dd48.76dd) = Server.
192.168.240.5 (000d.280c.fe1b) = Cisco AS5350 RAS server.
192.168.240.131 (0000.0000.0000) = PPP dial-in client on RAS server.
000292: *Mar 1 00:21:22.819 UTC: IP ARP: creating incomplete entry for IP address: 192.168.240.131 interface Vlan1
000293: *Mar 1 00:21:22.819 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000298: *Mar 1 00:21:27.013 UTC: IP ARP: rcvd req src 192.168.240.21 5cf9.dd48.76dd, dst 192.168.240.131 Vlan1
000299: *Mar 1 00:21:27.441 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000306: *Mar 1 00:21:32.441 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000314: *Mar 1 00:21:37.449 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000323: *Mar 1 00:21:42.440 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000329: *Mar 1 00:21:47.440 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000334: *Mar 1 00:21:52.439 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000344: *Mar 1 00:21:57.447 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000350: *Mar 1 00:22:02.447 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000358: *Mar 1 00:22:07.430 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000364: *Mar 1 00:22:12.438 UTC: IP ARP: creating incomplete entry for IP address: 192.168.240.131 interface Vlan1
000365: *Mar 1 00:22:12.438 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40,dst 192.168.240.131 0000.0000.0000 Vlan1
000372: *Mar 1 00:22:17.437 UTC: IP ARP: sent req src 192.168.240.1 b4e9.b006.9e40, dst 192.168.240.131 0000.0000.0000 Vlan1
000373: *Mar 1 00:22:17.446 UTC: IP ARP: rcvd rep src 192.168.240.131 000d.280c.fe1b, dst 192.168.240.1 Vlan1
The first line of the debug shows the switch creating an “incomplete entry” for the dial-in client (192.168.240.131).
For all subsequent ICMP requests, you can see that the dial-in client has a MAC address of 0000.0000.0000 – I guess you would call this an incomplete entry.
On the last line of the debug output, you can see that the dial-in client (192.168.240.131) finally gets the MAC address of the AS5350 (000d.280c.fe1b) assigned to it – this is when we start getting ICMP replies.
So during this capture, there were 12 ICMP request timeouts before the dial-in client started receiving replies.
Below is the current config on my Cisco AS5350 RAS server:
Current configuration : 6741 bytes
version 12.3
service timestamps debug datetime localtime show-timezone
service timestamps log datetime localtime show-timezone
service password-encryption
hostname AS5350
boot-start-marker
no boot startup-test
boot-end-marker
logging buffered 2048000 debugging
enable secret 5 *********************
resource-pool disable
calltracker enable
spe country usa
spe call-record modem
spe default-firmware spe-firmware-1
aaa new-model
aaa authentication login default group tacacs+ local
aaa authentication login NO_AUTHEN none
aaa authentication enable default group tacacs+ enable
aaa authentication ppp dialin if-needed local
aaa authorization exec default group tacacs+ local
aaa authorization commands 0 default group tacacs+ local none
aaa authorization commands 1 default group tacacs+ local none
aaa authorization commands 15 default group tacacs+ local none
aaa accounting exec default start-stop group tacacs+
aaa accounting commands 0 default start-stop group tacacs+
aaa accounting commands 1 default start-stop group tacacs+
aaa accounting commands 15 default start-stop group tacacs+
aaa accounting network default start-stop group tacacs+
aaa session-id common
ip subnet-zero
ip cef
ip dhcp excluded-address 192.168.240.1 192.168.240.127
ip dhcp excluded-address 192.168.240.150 192.168.240.254
ip dhcp pool LOCAL
   network 192.168.240.0 255.255.255.0
   default-router 192.168.240.1
   lease 0 1
ip ssh time-out 10
ip ssh version 2
isdn switch-type primary-4ess
fax interface-type fax-mail
controller T1 3/0
shutdown
controller T1 3/1
framing esf
linecode b8zs
pri-group timeslots 1-24
description PRI on Copper
no crypto isakmp ccm
interface FastEthernet0/0
no ip address
shutdown
interface FastEthernet0/1
description Uplink to Switch – Gi0/2
ip address 192.168.240.5 255.255.255.0
duplex full
speed 100
interface Serial0/0
no ip address
shutdown
interface Serial0/1
no ip address
shutdown
interface Serial3/0:23
no ip address
shutdown
interface Serial3/1:23
description PRI on Copper
no ip address
encapsulation ppp
dialer rotary-group 2
dialer-group 2
isdn switch-type primary-4ess
isdn incoming-voice modem
isdn T306 60000
fair-queue
no cdp enable
interface Dialer2
ip unnumbered FastEthernet0/1
encapsulation ppp
dialer in-band
dialer idle-timeout 0
dialer-group 2
peer default ip address dhcp-pool LOCAL
fair-queue
no cdp enable
ppp authentication chap pap callin
ppp multilink
interface Group-Async0
no ip address
no group-range
interface Group-Async1
description Dial-up PRI modem lines
ip unnumbered FastEthernet0/1
encapsulation ppp
dialer in-band
dialer idle-timeout 0
async mode interactive
peer default ip address dhcp-pool LOCAL
fair-queue
ppp authentication chap pap callin
group-range 1/00 1/59
router eigrp 100
network 192.168.240.0
auto-summary
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.240.1
ip tacacs source-interface FastEthernet0/1
no ip http server
no ip http secure-server
logging history debugging
logging trap debugging
logging x.x.x.x
access-list 101 deny   eigrp any any
access-list 101 permit ip any any
access-list 101 remark dialer-list used for dialer-list 1
access-list 182 remark *** PERMIT SSH TO THIS DEVICE ***
access-list 182 permit tcp any any eq 22
access-list 182 deny   ip any any log
dialer-list 1 protocol ip permit
tacacs-server host x.x.x.x
tacacs-server host x.x.x.x
tacacs-server directed-request
tacacs-server key 7 *******************
control-plane
voice-port 3/0:D
voice-port 3/1:D
dial-peer cor custom
ss7 mtp2-variant Bellcore 0
ss7 mtp2-variant Bellcore 1
ss7 mtp2-variant Bellcore 2
ss7 mtp2-variant Bellcore 3
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
no exec
line vty 0 4
access-class 182 in
exec-timeout 30 0
logging synchronous
transport input ssh
escape-character BREAK
line 1/00 1/59
no modem callout
modem Dialin
rotary 1
transport input all
transport output all
autoselect during-login
autoselect ppp
scheduler allocate 10000 400
ntp clock-period 17180055
ntp server x.x.x.x
end
Cisco AS5350 IOS: c5350-ik9s-mz.123-11.T11.bin
Is anyone aware of an IOS bug or an error in my configurations that could be causing the delay in creating an ARP entry for the dial-in client?
I am open to any suggestions.
BTW, if I add static arp entries on the server, ICMP replies are typically received after one or two request timeouts.
However, I feel this is not a solution to the problem, only a band-aid fix.
arp -s 192.168.240.128 00-0d-28-0c-fe-1b
arp -s 192.168.240.129 00-0d-28-0c-fe-1b
arp -s 192.168.240.130 00-0d-28-0c-fe-1b
arp -s 192.168.240.131 00-0d-28-0c-fe-1b
arp -s 192.168.240.132 00-0d-28-0c-fe-1b
arp -s 192.168.240.133 00-0d-28-0c-fe-1b
arp -s 192.168.240.134 00-0d-28-0c-fe-1b
arp -s 192.168.240.135 00-0d-28-0c-fe-1b
arp -s 192.168.240.136 00-0d-28-0c-fe-1b
arp -s 192.168.240.137 00-0d-28-0c-fe-1b
arp -s 192.168.240.138 00-0d-28-0c-fe-1b
arp -s 192.168.240.139 00-0d-28-0c-fe-1b
arp -s 192.168.240.140 00-0d-28-0c-fe-1b
arp -s 192.168.240.141 00-0d-28-0c-fe-1b
arp -s 192.168.240.142 00-0d-28-0c-fe-1b
arp -s 192.168.240.143 00-0d-28-0c-fe-1b
arp -s 192.168.240.144 00-0d-28-0c-fe-1b
arp -s 192.168.240.145 00-0d-28-0c-fe-1b
arp -s 192.168.240.146 00-0d-28-0c-fe-1b
arp -s 192.168.240.147 00-0d-28-0c-fe-1b
arp -s 192.168.240.148 00-0d-28-0c-fe-1b
arp -s 192.168.240.149 00-0d-28-0c-fe-1b
Thank you for taking the time to read my post.
-Brad

Hi Krishnamraj,
How many records are you gettnig from server..?? Are they very huge..??
Thanks,
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1. connect to a https url and ignore whether the returned certificate is valid or not?
./wget --no-check-certificate "https://server1.com.kh/data/?action=datano;datano=aaaa"
2. connect to https url and only connect if the returned certificate is valid and/or in your truststore?
./wget --ca-directory=/cert "https://server1.com.kh/data/?action=datano;datano=aaaa"
3. connect to https url and provide your own client certificate to authenticate to server?
./wget private-key=/cert/data.pem certificate=/cert/data.crt "https://server1.com.kh/data/?action=datano;datano=aaaa"
4. something else...?

Error: Prefix number: entry missing for system REP client 113 Msg no 5W023

Hi, we're trying to study Workflow based on the manuals we downloaded online. Upon saving, we encountered the error: Error: Prefix number: entry missing for system REP client 113 Msg no 5W023.
Here's the diagnosis:
Diagnosis
Tasks, rules, and workflow definitions require an ID that is unique throughout all systems and clients. In this way, you can ensure that you can transport these objects from one system into another at any time (without restrictions). From a technical point of view, the uniqueness of the ID is ensured by what is known as a "prefix number". You can define a separate prefix number for every system and every client in table T78NR.
System Response
If a prefix number is not defined in the client in which you are currently working, it is not possible to maintain (maintenance terminates).
Procedure
Maintain table T78NR in Customizing, and create an entry for the system in question and the current client.
Hope somebody can help me understand what this is.. thanks so much and appreciate your help..
Thanks,
Angela Paula

Hi Angela,
Please check if the Prefix number is maintained in SWU3 t-code.
Go to Maintain Definition Environment -> Maintain Prefix Numbers and check if the prefix number is maintained.
Hope this helps!
Regards,
Saumya

XY Graph slow in response

Hi All,
I have 2 XY graphs in my VI and for some reason 1 XY is super slow in response. I have attached my vi here which demonstrates the behavior.
There are 2 XY graphs. The one on the top is super slow in response and the one below behaves normally.
Could anyone please look at the vi and let me know whats the problem with the slow graph?
Thanks,
Ritesh
Solved!
Go to Solution.
Attachments:
GraphSlowdown.vi ‏5541 KB

johnsold wrote:
Also because the X-axis data is linear, you could use a Waveform graph rather than the XY Graph.
That is definitely a valid suggestion, because ot drops the graph data by 50%. Here's a quick draft.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
EvenFasterGraph.vi ‏2771 KB

Adobe Premiere CC slow in response

Hi,
I recently upgarded to Adobe Premiere Pro CC and I notice that it is very slow in response and there is like 10 seconds lag for every step I do. I notice my computer goes up to 30 percent of workload. The problem arises when I am going from one sequence to another sequence, it lags or copy something in a sequence and then it lags. I have been using CC for 4 months and I did not have a problems with CS6. But this really annoys me.
My computer specs:
CPU i7-920 3.6gHz OC
48 GB of RAM @ 1466Mhz
Quadro K5000 with latest drivers
5x2TB at RAID 5
250gb OS SSD around 140 free space
120gb SSD - Around 40 free.
My cache drive was 120gB SSD, even I change the cache drive to RAID5 drives, it doesn't make a difference.
Now, when I export to render to Adobe media encoder, it takes 10sec. It used to take a sec to do that with CS6.
Is there something I could change in the settings that would make premiere pro faster in response?
I am looking forward for your reply.

I am having the same problem! Interestingly my Sony VAIO Duo 13 Ultrabook is pretty light on it's feet with Premiere but my custom built NLE frequently runs into these problems.
The result is that I can often load a project faster in the ultrabook and some projects I can actually edit faster!!? The ultrabook has a satisfyingly powerful Corei7 but no serious graphics capabilities to speak of, so rendering is software only and it bogs down a lot when working with compressed formats like AVHCD. I got it just to use it's Wacom digitizer for Photoshop and Illustrator but on my last video, I got frustrated with my desktop NLE machine and cut it on my tiny laptop. (Did it in the car on a road trip. Fun to be able to! But vastly less than ideal for anything very professional.)
My problem is that Once my desktop NLE is running, it can churn through very complex native editing like a dream. It's just that every time I need to change what the program is doing, it takes an exceedingly long time to load new components of the program, i.e. bringing up an effects panel or the audio mixer. My assumption is that once everything the program needs is loaded into ram, there is no problem, but the program is somehow interfering with computers reading and writing to the C: drive where the program is held. Maybe it is creating is some issue with ram caching to the C: drive that is slowing things down. After working with Premiere the problem persists and it takes equally long to open other programs. I had similar problems this summer with the CS6 AVHCD bug in this thread. This is not as bad, but seems very similar in its manifestation. There is no longer any connection to any one codec. Instead, the problem seems to emerge as Premiere has been running for a while. Or after opening Premiere, closing it and then reopening with out a system restart in between. A project imported from Final Cut Pro 6 via XML was particularly problematic, but the problem is sporadic so it was hard to tell if it was that or just a couple of bad days.
Any help or advice would be very much appreciated.
Here are my specs:
Windows 8 Pro x64
Intel Core i7-3770K 3.50GHz
RAM: 16 GB
Graphics: GTX 660 ti
Motherboard: ASUS P8Z77-V PRO Thunderbolt
C: drive: OCZ-Vertex 4 (120GB / 45 free)
D: drive: Contains Premiere Projects (16TB, RAID 0, 4 SATA3 drives on Intel Rapid Storage Chipset)
E: drive: Contains User Folders (1TB SATA3)

WEC7 DHCP Allocator not sending ACK for a DHCP client

Hi All,
I have a WEC7 device configured as DHCP Allocator.
My PC (windows 7) will get ip from DHCP allocator successfully.
WEC7 ip settings:
ip: 169.254.0.1
subnet: 255.255.0.0
DNS: 0.0.0.0
My PC Ip after got ip from WEC7 DHCP Allocator:
ip : 169.254.0.3
net mask: 255.255.0.0
DHCP server: 169.254.0.1
DNS server : 169.254.0.1
Default Gateway: 169.254.0.1
I have another device (Ethernet based energy Meter), I am getting below problem
-> Meter will send DHCP DISCOVER Command (Broadcast)
-> DHCP Allocator Sends DHCP OFFER command back (Broadcast)
-> Meter will send DHCP Request to DHCP Allocator (Broadcast)
Now meter expects DHCP ACK command but DHCP allocator not sending any command.
within ~3 sec Meter start sending DHCP DISCOVER Command. this will happen continuously.
some time DHCP server will send ACK, but by that time Meter start sending DHCP DISCOVER command.
I Tried testing this meter by connecting to my PC directly and running a simple DHCP Server on my PC, here Meter connected to sample server and got ip from server.
The DHCP Concept is working with WEC7DHCP Allocator to PC client, Meter to PC as server but not with WEC7 server and Meter.
I compared the packets, only the difference i can identify is PC client is configured with Host name and Meter not have nay host name.
Any idea on whats wrong with WEC7 and Meter combination?
Do you know any third party DHCP server?
Please suggest me,
rakesh

Hi All,
The problem is not yest solved.
As I mentioned in last post, only the difference between My PC and Meter is Meter don't have Device Name and we are not able to configure it.
Device Name is the real Problem? If yes how can i eliminate this dependency?
For Static ip allocation at HKEY_LOCAL_MACHINE\Comm\ConnectionSharing\Addresses\Address, aslo there is dependency on Device name, is it possible to map the ip to MAC instead of Device name?
One more thing I observer that, DHCP allocator will send response for DISCOVER or REQUEST after 3 seconds. As Meter will send next discover before getting ACK, please check below log.
But in PC the entire DHCP registration will finish within 1 sec, I am not understanding why DHCP Allocator delaying for responding
Any suggestions will be really appreciated. Please recommend any third party DHCP Server if any available (we are ready to purchase also)
Thanks in Advance
DHCP Allocator (WEC7) Ip: 169.254.0.1
ip allocated from WEC7 for my PC : 169.254.0.15
Meter ip : 0.0.0.0
rakesh

Slow ARP response for dial-in clients

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