HP 5500 Ei 5500 Si Switch Series Configuration Guide

 22 
•  Suppress timer —Defines how long a RIP route stays in suppr essed state. When the metric of a route 
is 16, the route enters the suppressed state. In su ppressed state, only routes coming from the same 
neighbor and whose metric is less than 16 will be  received by the router to replace unreachable 
routes. 
•   Garbage-collect timer — D efi n es  t h e  i nte r va l  fro m  wh e n  t h e  m e t ric  of  a  ro u te  b e c o mes  16  to  wh e n  i t  
is deleted from the routing table. During the...

 23 
•  Supports simple authentication and MD5 authentication to enhance security.   
  NOTE: 
RIPv2 has two types of messa
ge transmission: broadcast and multicast. Multicast is the default type using
224.0.0.9 as the multicast address. The interface oper ating in the RIPv2 broadcast mode can also receive
RIPv1 messages. 
 
RIP message format 
A RIP message consists of a header and up to 25 rout e entries. (A RIPv2 authentication message uses the 
first route entry as the authentication entry, leaving...

 24 
The differences between RIPv1 and RIPv2 messages are stated as follows: 
•   Version –Version of RIP. For RIPv2 the value is 0x02. 
•   Route tag. 
•   IP address —Destination IP address. It can be a natural network address, subnet address, or host 
address. 
•   Subnet mask —Mask of the destination address. Unlike RIPv1, RIPv2 can carry subnet information. 
•   Next hop —If set to 0.0.0.0, it indicates that the originator of the route is the best next hop. 
Otherwise, it indicates a next hop better...

 25 
Protocols and standards 
•  RFC 1058,  Routing Information Protocol  
•   RFC 1723,  RIP Version 2 - Carrying Additional Information  
•   RFC 1721,  RIP Version 2 Protocol Analysis  
•   RFC 1722,  RIP Version 2 Protocol Applicability Statement  
•   RFC 1724,  RIP Version 2 MIB Extension  
•   R FC  2 082,   RIPv2 MD5 Authentication  
•   RFC 2453,  RIP Version 2  
RIP configuration task list 
 
Task Remarks 
Configuring RIP basic functions  Required 
Configuring RIP route 
control Configuring an...

 26 
Configuring RIP basic functions 
Configuration prerequisites 
Before you configure RIP basic functions, complete the following tasks: 
•  Configure the link layer protocol. 
•   Configure IP addresses for interfaces, and make sure that all neighboring routers can reach each 
other. 
Enabling RIP and a RIP interface 
Follow these guidelines when you enable RIP: 
•  RIP configurations made in interface view before enabling RIP take effect after RIP is enabled. 
•   RIP runs only on the interfaces...

 27 
Step Command Remarks 
7.  Enable the interface to send 
RIP messages.  rip output  Optional. 
Enabled by default.
 
 
Configuring a RIP version 
You can configure a RIP version in RIP view or  interface view under the following conditions. 
•   If neither global nor interface RIP version is co nfigured, the interface sends RIPv1 broadcasts and 
can receive the following packets: RIPv1 broadcast, RIPv1 unicast, RIPv2 broadcast, RIPv2 multicast, 
and RIPv2 unicast. 
•   If an interface has no RIP...

 28 
Setting the DSCP value for RIP packets 
An IPv4 packet header contains an 8-bit Type of Service (ToS) field. As defined in RFC 2474, the first six 
bits set the Differentiated Services Code Point (DSCP) value, and the last two bits are reserved. Network 
devices use the DSCP value as a reference to determine the packet priority for transmission.  
You can set the DSCP value for RIP packets. 
To set the DSCP value for RIP packets: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2....

 29 
 
Configuring RIPv2 route summarization 
Route summarization means that subnets in a natural network are summarized into a natural network that 
is sent to other networks. This feature can reduce the size of routing tables. 
After route summarization, the smallest metric among all the summarized routes is used as the metric of 
the summary route.  
Enabling RIPv2 route automatic summarization 
You can disable RIPv2 route automatic summarization if you want to advertise all subnet routes. 
To enable...

 30 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter RIP view.  rip
 [ process-id  ] [ vpn-instance  
vpn-instance-name  ]  N/A 
3.
  Disable RIP from receiving 
host routes.  undo host-route 
Enabled by default. 
 
Advertising a default route 
Under the following conditions, you can configure RIP to  advertise a default route with a specified metric 
to RIP neighbors: 
•   In RIP view, you can configure all the interfaces of the RIP process to advertise a default route; in...

 31 
To configure route filtering:  
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter RIP view.  rip
 [ process-id  ] [ vpn-instance  
vpn-instance-name  ]  N/A 
3.
  Configure the filtering of 
incoming routes.  filter-policy { acl-number 
| 
gateway  ip-prefix-name  | ip-prefix 
ip-prefix-name  [ gateway 
ip-prefix-name  ] } import 
[ interface-type interface-number  ] Not configured by default. 
The 
filter-policy import command 
filters incoming routes. Routes not 
passing...