will do. thank you ________________________________
From: Jeff Bunting [mailto:[email protected]] Sent: Friday, March 06, 2009 12:02 PM To: NT System Admin Issues Subject: Re: QoS for VoIP on Cisco router There's a lot of errors on that port. I'd "clear counters" and see if they are still occurring or if they are from a past problem. I'm referring to the input & framing errors, carrier transitions, and interface resets. Looks like the circuit is dropping (or it could be an outage in the past). Jeff On Fri, Mar 6, 2009 at 11:33 AM, David Mazzaccaro <[email protected]> wrote: Yes, it is a 384k circuit point-point Results of show int ser0/0/0 are below. What am I looking for here? Serial0/0/0 is up, line protocol is up Hardware is GT96K with integrated T1 CSU/DSU Internet address is xxx.xxx.xxx.xxx/30 MTU 1500 bytes, BW 384 Kbit, DLY 20000 usec, reliability 255/255, txload 3/255, rxload 3/255 Encapsulation HDLC, loopback not set Keepalive set (10 sec) Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 780 Queueing strategy: Class-based queueing Output queue: 0/1000/64/774 (size/max total/threshold/drops) Conversations 0/9/128 (active/max active/max total) Reserved Conversations 1/1 (allocated/max allocated) Available Bandwidth 4 kilobits/sec 5 minute input rate 5000 bits/sec, 8 packets/sec 5 minute output rate 6000 bits/sec, 9 packets/sec 24582319 packets input, 1599238634 bytes, 0 no buffer Received 268498 broadcasts, 0 runts, 0 giants, 0 throttles 36522 input errors, 36518 CRC, 6885 frame, 3165 overrun, 0 ignored, 16167 a bort 23305347 packets output, 3375885992 bytes, 0 underruns 0 output errors, 0 collisions, 2618 interface resets 0 output buffer failures, 0 output buffers swapped out 11 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Results of show policy-map int ser0/0/0: Serial0/0/0 Service-policy output: 75_24 Class-map: ef (match-any) 12445220 packets, 2538824880 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp ef (46) 12445219 packets, 2538824676 bytes 5 minute rate 0 bps Queueing Strict Priority Output Queue: Conversation 136 Bandwidth 75 (%) Bandwidth 288 (kbps) Burst 7200 (Bytes) (pkts matched/bytes matched) 33385/6810540 (total drops/bytes drops) 0/0 Class-map: af41 (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp af41 (34) 0 packets, 0 bytes 5 minute rate 0 bps Queueing Output Queue: Conversation 137 Bandwidth 24 (%) Bandwidth 92 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0 (depth/total drops/no-buffer drops) 0/0/0 Class-map: class-default (match-any) 10864539 packets, 837569600 bytes 5 minute offered rate 3000 bps, drop rate 0 bps Match: any Queueing Flow Based Fair Queueing Maximum Number of Hashed Queues 128 (total queued/total drops/no-buffer drops) 0/774/0 QoS Set dscp default Packets marked 10551112 Thanks again! ________________________________ From: Rohyans, Aaron [mailto:[email protected]] Sent: Friday, March 06, 2009 9:54 AM To: NT System Admin Issues Subject: RE: QoS for VoIP on Cisco router Looks good to me! J What is the speed of the link? Looks like a 384Kb/s FT1. Is this a Point to Point T1, or a DIA (Dedicated Internet Access) T1? How saturated is the link during congestion (you can do a "show int ser0/0/0" during congestion and look at the "rxload" and "txload" to get an idea)? I'm assuming it's using HDLC based on the lack of extra config on the serial interface. What does the output of "show policy-map interface serial 0/0/0" give you during times of congestion? Any drops? Is it matching traffic correctly? Hope this helps, Aaron T. Rohyans Senior Network Engineer CCIE #21945, CCSP, CCNA, CQS-Firewall, CQS-IDS, CQS-VPN, ISSP, CISP, JNCIA-ER DPSciences Corporation 7400 N. Shadeland Ave., Suite 245 Indianapolis, IN 46250 Office: (317) 348-0099 Fax: (317) 849-7134 [email protected] <mailto:[email protected]> http://www.dpsciences.com/ <http://www.dpsciences.com/> From: David Mazzaccaro [mailto:[email protected]] Sent: Friday, March 06, 2009 9:17 AM To: NT System Admin Issues Subject: QoS for VoIP on Cisco router Could someone check my router config? I am no cisco expert (not even a CCNA)...but... I am trying to configure quality of service for voice over IP. I believe I have it set up correctly, but the users are still getting choppy phone conversations when there is other network traffic on the circuit. Here's a snip of the config: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ boot-start-marker boot-end-marker ! logging buffered 4096 debugging enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxx ! no aaa new-model ! resource policy ! memory-size iomem 25 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 ip subnet-zero no ip source-route ip cef ! no ip dhcp use vrf connected ip dhcp binding cleanup interval 10 ip dhcp excluded-address 192.168.6.1 ! ip domain name yourdomain.com ! class-map match-any af41 match ip dscp af41 class-map match-any ef match ip dscp ef ! policy-map 75_24 class ef priority percent 75 class af41 bandwidth percent 24 class class-default fair-queue set ip dscp default ! interface FastEthernet0/0 description $ETH-LAN$$ETH-SW-LAUNCH$$INTF-INFO-FE 0$ ip address 192.168.6.1 255.255.255.0 duplex auto speed auto no keepalive ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address xxx.xxx.xxx xxx.xxx.xxx.xxx service-module t1 timeslots 1-6 max-reserved-bandwidth 100 service-policy output 75_24 ! ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0/0 ! no ip http server ip http access-class 23 ip http authentication local ip http timeout-policy idle 60 life 86400 requests 10000 ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Any help/guidance is greatly appreciated. Thanks, Dave ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
