HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enter OSPF view.  ospf 
[ process-id  | router-id  router-id  | 
vpn-instance  vpn-instance-name ] *
 N/A
 
3.  Enable the advertisement and 
reception of opaque LSAs.  opaque-capability enable  Optional. 
Disabled by default. 
 
Configuring OSPF to give priority to receiving and processing 
hello packets 
To ensure OSPF runs properly, a router receives an
d processes hello packets and other protocol packets 
at the same time. When...

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Setting the DSCP value for OSPF packets 
An IPv4 packet header contains an 8-bit 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 determ ine the packet priority for transmission. 
You can set the DSCP value for OSPF packets. 
To set the DSCP value for OSPF packets: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Enable an OSPF...

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In Figure 37 , af ter you enable FRR on Router B, OSPF au tomatically calculates or designates a backup 
next hop when a link failure is detected. Packets are  directed to the backup next hop. At the same time, 
OSPF calculates the shortest path based on the ne w network topology, and forwards packets over the 
path after routing convergence.  
You can either configure OSPF FRR to calculate a backup next hop automatically, or to designate a 
backup next hop by using a routing policy. 
Configuration...

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Configuring OSPF Graceful Restart 
OSPF GR involves the following: 
•  IETF standard GR —Uses Opaque LSAs to implement GR.  
•   Non IETF standard GR—Uses link local signaling (LLS) to advertise GR capability and uses out of 
band synchronization to synchronize the LSDB.  
A device can act as a GR Restarter and GR Helper at the same time. 
Configuring the OSPF GR Restarter 
You can configure the IETF standard or  non IETF standard OSPF GR Restarter. 
Configuring the IETF standard OSPF GR Restarter...

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Configuring the OSPF GR Helper 
You can configure the IETF standard or non-IETF standard OSPF GR Helper. 
Configuring the IETF standard OSPF GR Helper 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Enable OSPF and enter its 
view.  ospf 
[ process-id  | router-id  
router-id  | vpn-instance  
vpn-instance-name  ] *  N/A 
3.
  Enable opaque LSA reception 
and advertisement.  opaque
-capability  enable  Not enabled by default. 
4.  Configure the neighbors for 
which the router...

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Configuring BFD for OSPF 
OSPF supports the following BFD detection methods: 
•  Control packet bidirectional detection, which requir es BFD configuration to be made on both OSPF 
routers on the link.  
•   Echo packet single-hop detection, which requires BF D configuration to be made on one OSPF router 
on the link.  
Configuring control packet bidirectional detection 
Both ends of a BFD session must be on the same  network segment and in the same area. One network 
segment can only belong to one...

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Task Command Remarks 
Display Link State Database 
information.  display ospf
 [ process-id  ] lsdb [ brief | [ { ase | 
router  | network  | summary |  asbr | nssa  | 
opaque-link  | opaque-area  | opaque-as  } 
[ link-state-id  ] ] [ originate-router 
advertising-router-id  | self-originate  ] ] [ | { begin 
|  exclude  | include  } regular-expression ]
 Available in any 
view
 
Display OSPF neighbor 
information.
  display ospf [
 process-id ] peer [ verbose  ] 
[  interface-type interface-number...

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OSPF configuration examples 
These examples only cover commands for OSPF configuration. 
Configuring OSPF basic functions 
Network requirements 
As shown in Figure 38, all s witches run OSPF. The AS is split into three areas, where Switch A and Switch 
B act as ABRs to forward routing information between areas. 
After configuration, all switches can learn routes to every network segment in the AS. 
Figure 38  Network diagram 
 
 
Configuration procedure 
1. Configure IP addresses for inte rfaces....

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# Configure Switch C 
 system-view 
[SwitchC] ospf 
[SwitchC-ospf-1] area 1 
[SwitchC-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 
[SwitchC-ospf-1-area-0.0.0.1] network 10.4.1.0 0.0.0.255 
[SwitchC-ospf-1-area-0.0.0.1] quit 
[SwitchC-ospf-1] quit 
# Configure Switch D 
 system-view 
[SwitchD] ospf 
[SwitchD-ospf-1] area 2 
[SwitchD-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 
[SwitchD-ospf-1-area-0.0.0.2] network 10.5.1.0 0.0.0.255 
[SwitchD-ospf-1-area-0.0.0.2] quit 
[SwitchD-ospf-1] quit...

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 Routing for Network 
 Destination        Cost     Type    NextHop         AdvRouter       Are\
a 
 10.2.1.0/24        10       Transit 10.2.1.1        10.2.1.1        0.0\
.0.1 
 10.3.1.0/24        4        Inter   10.1.1.2        10.3.1.1        0.0\
.0.0 
 10.4.1.0/24        13       Stub    10.2.1.2        10.4.1.1        0.0\
.0.1 
 10.5.1.0/24        14       Inter   10.1.1.2        10.3.1.1        0.0\
.0.0 
 10.1.1.0/24        2        Transit 10.1.1.1        10.2.1.1        0.0\
.0.0...