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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 the router has established neighbor relationships with multiple routers, and the 
routing table size is big, the router must receive and process large numbers of packets. In this case, you 
can configure OSPF to give priority to receiving and processing hello packets to ensure stable neighbor 
relationships. 
To configure OSPF to give priority to receiving and processing hello packets: 
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Configure OSPF to 
give priority to 
receiving and 
processing hello 
packets.  ospf packet-process prioritized-treatment 
Not configured by default. 
 
Configuring the LSU transmit rate 
Sending large numbers of LSU packets affects rout er performance and consumes too much network 
bandwidth. You can configure the router to send LSU packets at a proper interval and limit the maximum 
number of LSU packets sent out of an OSPF interface each time.  
To configure the LSU transmit rate: 
 
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.  Configure the LSU 
transmit rate.  transmit-pacing interval
 interval  count  count  Optional. 
By default, an OSPF interface 
sends up to three LSU packets 
every 20 milliseconds.
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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 
process and enter 
OSPF view.   ospf 
[ process-id  | router-id  router-id  | 
vpn-instance  vpn-instance-name  ] *
  By default, OSPF is not enabled.
 
3.  Set the DSCP value 
for OSPF packets.  dscp
 dscp-value   Optional. 
By default, the DSCP value in OSPF 
packets is 48. 
 
Enabling OSPF ISPF 
When a network topology is changed, Incremental Shortest Path First (ISPF) allows the system to 
recomputes only the affected part of the shortest path tree (SPT), instead of the entire SPT.  
To enable OSPF ISPF:  
 
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 OSPF ISPF. 
ispf enable  Optional. 
Disabled by default. 
 
Configuring OSPF FRR 
When a link fails, the packets on the link are discarded, and a routing loop may occur until OSPF 
completes routing convergence based on the new network topology.  
You can enable OSPF fast reroute (FRR) to solve this problem. 
Figure 37
 Network diagram for OSPF FRR
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    							 94 
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 prerequisites 
Before you configure OSPF FRR, complete the following tasks: 
•   Configure network layer addresses for interfaces. 
•   Enable OSPF. 
Configuration guideliens 
•  Do not use FRR and BFD at the same time. Otherwise, FRR may fail to take effect.  
•   Do not use the  fast-reroute auto  command together with the commands vlink-peer . 
Configuring OSPF FRR to automatically calculate a backup next hop 
 
Step Command Remarks 
1.  Enter system view. 
system-view  N/A 
2.  Configure the source address 
of echo packets.  bfd echo-source-ip 
ip-address Not configured by default. 
3.  Enter OSPF view.  ospf 
[ process-id  | router-id  
router-id  | vpn-instance  
vpn-instance-name  ] *
  N/A
 
4.  Enable OSPF FRR to 
automatically calculate a 
backup next hop.  fast-reroute 
auto [ abr-only  ] Not configured by default. 
If 
abr-only  is specified, the route to the 
ABR is selected as the backup path. 
 
Configuring OSPF FRR to designate a backup next hop with a routing policy 
Before configuring this task, you need to use the  apply fast-reroute backup-interface command to specify 
a backup next hop in the routing policy to be referenced. For more information about the  apply 
fast-reroute backup-interface  command and routing policy configuration, see  Configuring routing 
poli

cies . 
To configure OSPF FRR:  
 
Step Command Remarks 
1.   Enter system view. 
system-view  N/A 
2.  Configure the source address 
of echo packets.  bfd echo-source-ip 
ip-address Not configured by default. 
3.  Enter OSPF view.  ospf 
[ process-id  | router-id  
router-id  | vpn-instance  
vpn-instance-name  ] *
  N/A
 
4.  Enable OSPF FRR to 
designate a backup next hop 
by using a routing policy.  fast-reroute 
route-policy 
route-policy-name   Not configured by default.
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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 
 
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 
advertisement capability.  opaque-capability enable 
Disabled by default. 
4.  Enable the IETF standard 
Graceful Restart capability.  graceful-restart ietf 
Disabled by default. 
5.  Configure the Graceful Restart 
interval.  graceful-restart interval
 timer   Optional. 
120 seconds by default. 
 
Configuring the non-IETF standard OSPF GR Restarter 
 
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 the link-local signaling 
capability.  enable link-local-signaling 
Disabled by default. 
4.  Enable the out-of-band 
re -synchronization capability.  enable 
out-of-band-resynchronization 
Disabled by default. 
5.
  Enable non-IETF standard 
Graceful Restart capability for 
OSPF.  graceful-restart
 [ nonstandard ]  Disabled by default. 
6.  Configure Graceful Restart 
interval for OSPF.  graceful-restart
 interval  timer   Optional. 
120 seconds by default.
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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 can serve as 
a GR Helper.  graceful-restart help 
{ acl-number 
|  prefix  prefix-list  }  Optional. 
The router can serve as a GR 
Helper for any OSPF neighbor by 
default.
 
 
Configuring the non 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 the link-local signaling 
capability.  enable link-local-signaling 
Disabled by default. 
4.  Enable the out-of-band 
re -synchronization capability.  enable 
out-of-band-resynchronization 
Disabled by default. 
5.
  Configure the neighbors for 
which the router can serve as 
a GR Helper.  graceful-restart help 
{ acl-number 
|  prefix  prefix-list  }  Optional. 
The router can serve as a GR 
Helper for any OSPF neighbor by 
default.
 
 
Triggering OSPF Graceful Restart 
Performing a Master/Slave switchover, or performing  the following configuration on an OSPF router, will 
trigger OSPF Graceful Restart. 
To trigger OSPF Graceful Restart: 
 
Task Command Remarks 
Trigger OSPF Graceful Restart.  reset ospf
 [ process -id  ] process 
graceful-restart   Available in user view
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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 area. 
To enable BFD control packet bidirectional detection on an OSPF interface: 
 
Step Command Description 
1.   Enter system view. 
system-view N/A 
2.  Enter interface view.  interface
 interface-type 
interface-number   N/A 
3.
  Enable BFD control packet bidirectional 
detection on the interface.  ospf bfd enable Not enabled by 
default. 
 
Configuring echo packet single-hop detection  
Step Command Description 
1.
  Enter system view. 
system-view N/A 
2.  Configure the source address of echo 
packets.  bfd echo-source-ip 
ip-address  Not configured by 
default. 
3.
  Enter interface view.  interface
 interface-type 
interface-number   N/A 
4.
  Enable BFD echo packet single-hop 
detection on the interface.  ospf bfd enable echo Not enabled by 
default. 
 
Displaying and maintaining OSPF 
 
Task Command Remarks 
Display OSPF brief information.
 display ospf [ process-id
 ] brief [ | { begin  | 
exclude  | include  } regular-expression ]
 Available in any 
view 
Display OSPF statistics.
 display ospf [ 
process-id ] cumulative [ |  { begin | 
exclude  | include  } regular-expression ]
 Available in any 
view
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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  ] [  neighbor-id  ] 
[ |  { begin |  exclude | include } 
regular-expression  ]
  Available in any 
view
 
Display neighbor statistics of OSPF 
areas.  display ospf
 [ process-id  ] peer  statistics  [ | { begin  
|  exclude  | include  } regular-expression ]  Available in any 
view
 
Display next hop information.
 display ospf
 [ process-id  ] nexthop [ | { begin | 
exclude  | include  } regular-expression ]
 Available in any 
view
 
Display routing table information.
 display ospf
 [ process-id  ] routing  [ interface 
interface-type interface-number  ] [ nexthop 
nexthop-address  ] [ | { begin |  exclude | include  } 
regular-expression  ]  Available in any 
view
 
Display virtual link information.
 display ospf
 [ process-id  ] vlink  [ | { begin | 
exclude  | include  } regular-expression ]  Available in any 
view
 
Display OSPF request queue 
information.
  display ospf [
 process-id ] request-queue 
[ interface-type interface-number  ] [ neighbor-id ] 
[ |  { begin |  exclude | include } 
regular-expression  ]  Available in any 
view
 
Display OSPF retransmission 
queue information.
 display ospf [ process-id
 ] retrans-queue 
[  interface-type interface-number  ] [ neighbor-id ] 
[ |  { begin |  exclude | include } 
regular-expression  ]  Available in any 
view
 
Display OSPF ABR and ASBR 
information.
  display ospf
 [ process-id  ] abr-asbr [ | { begin | 
exclude  | include  } regular-expression ]  Available in any 
view
 
Display OSPF interface 
information.
  display ospf [ process-id 
] interface [ all  | 
interface-type  interface-number  ] [ | { begin | 
exclude  | include  } regular-expression ]  Available in any 
view
 
Display OSPF error information.
 display ospf
 [ process-id  ] error [ | { begin | 
exclude  | include  } regular-expression ]  Available in any 
view
 
Display OSPF ASBR 
summarization information.  display ospf [
 process-id  ]  asbr-summary  
[ ip-address  { mask  | mask-length  } ] [ | { begin  | 
exclude  | include  } regular-expression ]  Available in any 
view
 
Display the global router ID.  display router id
 [ | { begin |  exclude | include  } 
regular-expression  ]  Available in any 
view
 
Reset OSPF counters.  reset ospf
 [ process-id  ] counters [ neighbor 
[ interface-type interface-number  ] [ router-id ] ]  Available in user 
view 
Reset an OSPF process. 
reset ospf  [ process-id  ] process [ graceful-restart  ] Available in user 
view
 
Re-enable OSPF route 
redistribution.  reset
 ospf  [ process-id  ] redistribution
 Available in user 
view
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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. (Details not shown.) 
2. Configure OSPF basic functions: 
# Configure Switch A. 
 system-view 
[SwitchA] ospf 
[SwitchA-ospf-1] area 0 
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 
[SwitchA-ospf-1-area-0.0.0.0] quit 
[SwitchA-ospf-1] area 1 
[SwitchA-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 
[SwitchA-ospf-1-area-0.0.0.1] quit 
[SwitchA-ospf-1] quit 
# Configure Switch B. 
 system-view 
[SwitchB] ospf 
[SwitchB-ospf-1] area 0 
[SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 
[SwitchB-ospf-1-area-0.0.0.0] quit 
[SwitchB-ospf-1] area 2 
[SwitchB-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 
[SwitchB-ospf-1-area-0.0.0.2] quit 
[SwitchB-ospf-1] quit 
Area 0
Area 1 Area 2
Switch C
Vlan-int100 10.1.1.2/24
Vlan-int100
10.1.1.1/24
Vlan-int300
10.4.1.1/24
Vlan-int200
10.2.1.2/24
Switch B
Vlan-int200
10.3.1.1/24
Vlan-int200
10.3.1.2/24
Switch A
Vlan-int20010.2.1.1/24
Vlan-int30010.5.1.1/24
Switch D
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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 
3. Verify the configuration: 
# Display information about neighbors on Switch A. 
[SwitchA] display ospf peer verbose 
 
          OSPF Process 1 with Router ID 10.2.1.1 
                  Neighbors 
 
 Area 0.0.0.0 interface 10.1.1.1(Vlan-interface100)s neighbors 
 Router ID: 10.3.1.1         Address: 10.1.1.2         GR State: Normal \
   State: Full  Mode: Nbr is Master  Priority: 1 
   DR: 10.1.1.1  BDR: 10.1.1.2  MTU: 0 
   Dead timer due in 37  sec 
   Neighbor is up for 06:03:59 
   Authentication Sequence: [ 0 ] 
   Neighbor state change count: 5 
 
                  Neighbors 
 
 Area 0.0.0.1 interface 10.2.1.1(Vlan-interface200)s neighbors 
 Router ID: 10.4.1.1         Address: 10.2.1.2         GR State: Normal \
   State: Full  Mode: Nbr is Master  Priority: 1 
   DR: 10.2.1.1  BDR: 10.2.1.2  MTU: 0 
   Dead timer due in 32  sec 
   Neighbor is up for 06:03:12 
   Authentication Sequence: [ 0 ] 
   Neighbor state change count: 5 
# Display OSPF routing information on Switch A. 
[SwitchA] display ospf routing 
 
          OSPF Process 1 with Router ID 10.2.1.1 
                   Routing Tables
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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 
 
 Total Nets: 5 
 Intra Area: 3  Inter Area: 2  ASE: 0  NSSA: 0 
# Display the Link State Database on Switch A. 
[SwitchA] display ospf lsdb 
 
          OSPF Process 1 with Router ID 10.2.1.1 
                  Link State Database 
 
                          Area: 0.0.0.0 
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metr\
ic 
 Router    10.2.1.1        10.2.1.1          1069  36    80000012       \
0 
 Router    10.3.1.1        10.3.1.1           780  36    80000011       \
0 
 Network   10.1.1.1        10.2.1.1          1069  32    80000010       \
0 
 Sum-Net   10.5.1.0        10.3.1.1           780  28    80000003      1\
2 
 Sum-Net   10.2.1.0        10.2.1.1          1069  28    8000000F      1\
0 
 Sum-Net   10.3.1.0        10.3.1.1           780  28    80000014       \
2 
 Sum-Net   10.4.1.0        10.2.1.1           769  28    8000000F      1\
3 
                          Area: 0.0.0.1 
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metr\
ic 
 Router    10.2.1.1        10.2.1.1           769  36    80000012       \
0 
 Router    10.4.1.1        10.4.1.1          1663  48    80000012       \
0 
 Network   10.2.1.1        10.2.1.1           769  32    80000010       \
0 
 Sum-Net   10.5.1.0        10.2.1.1           769  28    80000003      1\
4 
 Sum-Net   10.3.1.0        10.2.1.1          1069  28    8000000F       \
4 
 Sum-Net   10.1.1.0        10.2.1.1          1069  28    8000000F       \
2 
 Sum-Asbr  10.3.1.1        10.2.1.1          1069  28    8000000F       \
2 
# Display OSPF routing information on Switch D. 
[SwitchD] display ospf routing 
 
          OSPF Process 1 with Router ID 10.5.1.1 
                   Routing Tables 
 
 Routing for Network 
 Destination        Cost     Type    NextHop         AdvRouter       Are\
a 
 10.2.1.0/24        22       Inter   10.3.1.1        10.3.1.1        0.0\
.0.2 
 10.3.1.0/24        10       Transit 10.3.1.2        10.3.1.1        0.0\
.0.2 
 10.4.1.0/24        25       Inter   10.3.1.1        10.3.1.1        0.0\
.0.2 
 10.5.1.0/24        10       Stub    10.5.1.1        10.5.1.1        0.0\
.0.2 
 10.1.1.0/24        12       Inter   10.3.1.1        10.3.1.1        0.0\
.0.2
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