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ME60 V800R010C10SPC500 Configuration Guide - IP Routing 01

This is ME60 V800R010C10SPC500 Configuration Guide - IP Routing
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring RIP Fast Convergence

Configuring RIP Fast Convergence

The network convergence speed is one of the key factors used to evaluate network performance.

Usage Scenario

The route convergence speed on a device is a performance index used to measure the network quality. Fast route convergence can improve the accuracy of routing information on the network.

Pre-configuration Tasks

Before configuring RIP fast convergence, complete the following tasks:

Configuration Procedure

Perform one or more of the following configurations as required.

Configuring RIP-2 Route Summarization

Configuring RIP-2 route summarization reduces the routing table size, which improves system performance and network security.

Context

On a medium-or large-sized network, the routing table contains a large number of routes. Storing and managing the routes consume a large number of memory resources. To resolve this problem, RIP provides the route summarization function. Route summarization is the process of summarizing routes that share the same next hop but are destined for different subnets of a network segment into one route. The system then advertises the summary route to other network segments. Route summarization reduces the number of routes in the routing table and minimizes system resource consumption. In addition, if a specific link frequently alternates between Up and Down, the links not involved in the route summarization will not be affected, which prevents route flapping and improves network stability.
NOTE:

RIP-1 does not support route summarization.

Procedure

  • Enable RIP-2 automatic route summarization.
    1. Run system-view

      The system view is displayed.

    2. Run rip [ process-id ]

      A RIP process is created, and the RIP view is displayed.

    3. Run summary [ always ]

      RIP-2 automatic route summarization is enabled.

      NOTE:

      If you specify always, RIP-2 automatic route summarization takes effect, regardless of whether split horizon and poison reverse has been configured.

    4. Run commit

      The configuration is committed.

  • Configure RIP-2 to advertise the summarized route.
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. Run rip summary-address ip-address mask [ avoid-feedback ]

      RIP-2 is configured to advertise the summarized route to the specified IP address.

      If you specify avoid-feedback, the local interface does not learn the summarized route whose destination address is the same as that the advertised summarized route, which prevents routing loops.

    4. Run commit

      The configuration is committed.

Configuring RIP Timers

There are four RIP timers: Update, Age, Suppress, and Garbage-collect timers. You can adjust the RIP convergence speed by changing the values of RIP timers.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run rip [ process-id ]

    A RIP process is created, and the RIP view is displayed.

  3. Run timers rip update age suppress garbage-collect

    RIP timers are configured.

  4. Run commit

    The configuration is committed.

Follow-up Procedure

The value of update is less than that of age, and the value of suppress is less than that of garbage-collect. Setting improper values for the timers affects RIP convergence speed and even causes route flapping on the network. For example, if the value of update is greater than that of age, a device cannot inform its neighbors of the change of RIP routes immediately.

Configuring the Suppress timer can prevent routing loops. For details, see Configuring Suppression Timers.

Configuring RIP Triggered Update

You can speed up network convergence by changing the values of triggered update timers.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run rip [ process-id ]

    A RIP process is created, and the RIP view is displayed.

  3. Run timers rip triggered { minimum-interval minimum-interval | incremental-interval incremental-interval | maximum-interval maximum-interval } *

    RIP triggered update timers are configured.

  4. Run commit

    The configuration is committed.

Setting the Interval at Which Packets Are Sent and the Maximum Number of the Sent Packets

You can set the interval at which RIP packets are sent and the maximum number of packets that can be sent at a time to control the memory used by a device to process RIP update packets.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run rip pkt-transmit { interval interval | number packet-count | bandwidth bandwidth-value } *

    The interval at which RIP packets are sent and the maximum number of packets sent each time are set by the interface.

  4. Run commit

    The configuration is committed.

Setting the Maximum Length of RIP packets

You can increase the maximum length of RIP packets to enable them to carry more routes, which improves bandwidth utilization.

Context

You can run the rip max-packet-length command to set a length greater than 512 bits for RIP packets only when the remote end can accept RIP packets longer than 512 bits.

After the maximum length of RIP packets is increased, Huawei devices may fail to communicate with non-Huawei devices. Therefore, exercise caution when running this command.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run rip max-packet-length { value | mtu }

    The maximum length of RIP packets is set.

    mtu specifies the maximum length of a RIP packet that can be accepted.

  4. Run commit

    The configuration is committed.

Setting the Maximum Number of RIP Routes

You can set the maximum number of RIP routes to make full use of network resources and improve network performance.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run rip [ process-id ]

    A RIP process is created, and the RIP view is displayed.

  3. Run maximum-routes max-number [ threshold threshold-value ]

    The maximum number of routes is set.

  4. Run commit

    The configuration is committed.

Verifying the Configuration of RIP Fast Convergence

After configuring RIP fast convergence, verify the running status of RIP, RIP routing information, all active routes in the RIP database, and information about interfaces.

Prerequisites

RIP fast convergence has been configured.

Procedure

  • Run the display rip [ process-id | vpn-instance vpn-instance-name ] command to check the running status and configuration of RIP.
  • Run the display rip process-id route command to check RIP routes.
  • Run the display rip process-id database [ verbose ] command to check all active RIP routes in the database.
  • Run the display rip process-id interface [ interface-type interface-number ] [ verbose ] command to check information about RIP interfaces.

Example

Run the display rip command to view the values of RIP timers.

<HUAWEI> display rip
  Public VPN-instance
    RIP process : 1
       RIP version   : 2
       Preference    : 100
       Checkzero     : Enabled
       Default-cost  : 0
       Summary       : Always
       Host-route    : Enabled
       Maximum number of balanced paths : 32
       Update time   : 100 sec     Age time             : 120 sec
       Suppress time : 140 sec      Garbage-collect time : 160 sec
       Graceful restart  : Disabled
       BFD               : Disabled
       Silent-interfaces : None
       Default-route : Disabled
       Verify-source : Enabled
       Networks : 
       10.0.0.0       
       Configured peers             : None
       Number of routes in database : 3
       Number of interfaces enabled : 1
       Number of VRRP interfaces    : 0
       Triggered updates sent       : 3
       Number of route changes      : 2
       Number of replies to queries : 1
  Total count for 1 process :
       Number of routes in database : 3
       Number of interfaces enabled : 1
       Number of VRRP interfaces    : 0
       Number of routes sendable in a periodic update : 1
       Number of routes sent in last periodic update : 0

Run the display rip process-id database command to view the summarized RIP route.

<HUAWEI> display rip 1 database
 0.0.0.0/0, cost 0, Default route originate      
   1.0.0.0/8, cost 0, ClassfulSumm
       1.1.1.0/24, cost 0, nexthop Rip-interface 
   10.0.0.0/8, cost 1, ClassfulSumm
       10.10.0.0/16, cost NA, IfSumm       
           10.10.10.10/32, cost 1, nexthop 1.1.1.1
           10.10.10.10/32, cost 1, nexthop 2.2.2.2

Run the display rip process-id interface verbose command to view the maximum length of RIP packets to be received by RIP packets.

<HUAWEI> display rip 1 interface verbose
GigabitEthernet1/0/0 (1.1.1.2)
  State    : UP              MTU: 0
  Metricin : 0
  Metricout: 1
  Input    : Disabled        Output: Disabled                  
  Protocol : RIPv2 Multicast                                   
  Send     : RIPv2 Multicast Packets                           
  Receive  : RIPv2 Multicast Packets                           
  Poison-reverse                : Enabled                      
  Split-Horizon                 : Enabled                      
  Authentication type           : None                         
  Max Packet Length             : 500                    
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Updated: 2019-01-04

Document ID: EDOC1100059437

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