Cisco Router 800 Series Software Configuration Guide
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8-5 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 8 Advanced Router Configuration Configuring TCP Maximum Segment Size for PPPoE Configuring TCP Maximum Segment Size for PPPoE The configuring TCP maximum segment size for PPP over Ethernet feature is supported on the following Cisco routers: Cisco 806 and 831 Cisco 826 and 836 Cisco 827, 827H, 827-4V, and 837 Cisco SOHO 77, SOHO 77H, SOHO 78, SOHO 96, and SOHO 97 Cisco 828 If a Cisco router terminates the PPPoE traffic, a...
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Chapter 8 Advanced Router Configuration Configuring Low Latency Queuing and Link Fragmentation and Interleaving 8-6 Cisco 800 Series Software Configuration Guide 78-5372-06 ! dsl operating-mode auto ! interface Dialer1 ip address negotiated ip mtu 1492 ip nat outside encapsulation ppp dialer pool 1 dialer-group 1 ppp authentication pap callin ppp pap sent-username sohodyn password 7 141B1309000528 ! ip nat inside source list 101 interface Dialer1 overload ip route 0.0.0.0.0.0.0.0 Dialer1...
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8-7 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 8 Advanced Router Configuration Configuring Low Latency Queuing and Link Fragmentation and Interleaving Configuring Low Latency Queuing Follow the steps below to configure the router for LLQ : Step 1Ensure that the voice and data packets have different IP precedence values so that the router can differentiate between them. Normally, data packets should have an IP precedence of 0, and voice packets should have an IP precedence...
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Chapter 8 Advanced Router Configuration Configuring LFI 8-8 Cisco 800 Series Software Configuration Guide 78-5372-06 Configuring LFI Follow the steps below to configure the router for LFI. NoteWhen you are configuring LFI, the data fragment size must be greater than the voice packet size; otherwise, the voice packets fragment, and voice quality deteriorates. Step 1Configure the dialer bandwidth. The dialer interface has a default bandwidth of 56 kbps, which may be less than the upstream...
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8-9 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 8 Advanced Router Configuration Configuring Class-Based Traffic Shaping to Support Low Latency Queuing Configuring Class-Based Traffic Shaping to Support Low Latency Queuing Class-based traffic shaping (CBTS) is supported on the following Cisco routers: Cisco 806 Cisco 831 CBTS can be used to control the WAN interface traffic transmission speed to match the speed of the attached broadband modem or of the remote target...
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Chapter 8 Advanced Router Configuration Configuring Class-Based Traffic Shaping to Support Low Latency Queuing 8-10 Cisco 800 Series Software Configuration Guide 78-5372-06 Step 2Define a policy map and associated classes for low-latency queuing. a.Enter the policy-map map-name command in global configuration mode to construct policies and to allocate different network resources for the defined traffic classes. The name LLQ could be used to specify that this is the policy map for LLQ. b.Now in...
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8-11 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 8 Advanced Router Configuration Configuring Class-Based Traffic Shaping to Support Low Latency Queuing d.Enter service-policy name to associate the LLQ policy map with the traffic-shaping policy map. If the map name for the low-latency queue were LLQ, then name would be LLQ. e.Enter exit twice to return to global configuration mode. Step 4Apply these policies to the Ethernet 1 interface. a.Enter the interface Ethernet 1...
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Chapter 8 Advanced Router Configuration
Configuring the Length of the PVC Transmit Ring
8-12
Cisco 800 Series Software Configuration Guide
78-5372-06 policy-map LLQ
class voice
priority 300
class class-default
fair-queue
policy-map shape
class class-default
shape average 2250000
service-policy LLQ
!
interface Ethernet0
ip address 1.7.65.11 255.255.0.0
!
interface Ethernet1
ip address 192.168.1.101 255.255.255.0
service-policy output shape
!
ip classless
ip http server
ip pim...
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8-13 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 8 Advanced Router Configuration Configuring the Length of the PVC Transmit Ring If both voice and data packets share the same PVC, it is important to reduce the PVC transmit (TX) ring size. This reduces the maximum number of data packets and fragments that can be in front of a voice packet in the hardware queue, thus reducing latency. Follow these steps to reduce the PVC TX ring size: Step 1Enter the global configuration int...
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Chapter 8 Advanced Router Configuration Configuring DHCP Server Import 8-14 Cisco 800 Series Software Configuration Guide 78-5372-06 ip address 60.0.0.1 255.255.255.0 encapsulation ppp dialer pool 1 service-policy output mypolicy ppp multilink ppp multilink fragment-delay 10 ppp multilink interleave ! ip classless no ip http server ! access-list 101 permit ip any any precedence 5 ! voice-port 1 ! voice-port 2 ! voice-port 3 ! voice-port 4 dial-peer voice 110 pots destination-pattern...