HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Configuration guidelines 
Follow these guidelines when you configure an ISATAP tunnel: 
•  No destination address needs to be configured for an ISATAP tunnel. The destination address of the 
tunnel can be automatically obtained through the IPv4 address embedded in the ISATAP address. 
•   To encapsulate and forward IPv6 packets whose destination address does not belong to the subnet 
where the receiving tunnel interface resides, configure a static route to reach the destination IPv6 
address...

 190 
Step Command Remarks 
8.  Enable dropping of IPv6 
packets using 
IPv4-compatible IPv6 
addresses.  tunnel discard 
ipv4-compatible-packet 
Optional. 
Disabled by default. 
 
Configuration example 
Network requirements 
As shown in Figure 3
, an IPv6 network is connected to an IPv4 network through an ISATAP switch. IPv6 
hosts reside in the IPv4 network.  
Configure the IPv6 hosts to access the IPv6 network through the ISATAP tunnel. 
Figure 3  Network diagram 
 
 
Configuration procedure 
Before...

 191 
[Switch-GigabitEthernet1/0/3] port service-loopback group 1 
[Switch-GigabitEthernet1/0/3] quit 
# Configure an ISATAP tunnel. 
[Switch] interface tunnel 0 
[Switch-Tunnel0] ipv6 address 2001::5efe:0101:0101 64 
[Switch-Tunnel0] source vlan-interface 101 
[Switch-Tunnel0] tunnel-protocol ipv6-ipv4 isatap 
# Disable the RA suppression so that hosts can acquire information such as the address prefix from 
the RA message released by the ISATAP switch. 
[Switch-Tunnel0] undo ipv6 nd ra halt 
#...

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  routing preference 1 
  EUI-64 embedded IPv4 address: 2.1.1.2 
  router link-layer address: 1.1.1.1 
    preferred global 2001::5efe:2.1.1.2, life 29d23h59m46s/6d23h59m46s (\
public) 
    preferred link-local fe80::5efe:2.1.1.2, life infinite 
  link MTU 1500 (true link MTU 65515) 
  current hop limit 255 
  reachable time 42500ms (base 30000ms) 
  retransmission interval 1000ms 
  DAD transmits 0 
  default site prefix length 48 
# By comparison, it is found that the host acquires the address...

 193 
Troubleshooting tunneling configuration 
Symptom 
After the configuration of related parameters such as tunnel source address, tunnel destination address, 
and tunnel mode, the tunnel interface is still not up. 
Solution 
1. The common cause is that the physical interf ace of the tunnel source is not up. Use the display 
interface tunnel  or display ipv6 interface tunnel  commands to view whether the physical interface 
of the tunnel source is up. If the physical interface is down, check th e...

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Index 
A B C D E I O P S T U  
A 
Address/prefix lease renewal,14 4 
A

pplication environment of trusted ports, 72 
A

pplying an extended address pool on an 
interface, 47 
A

pplying the address pool to an interface, 15 0 
ARP conf

iguration examples, 7 
As

signing an IP address to an interface, 24 
B 
B

OOTP client configuration example, 84 
C 
C

onfiguration guidelines, 12 
C

onfiguration procedure,10 9  
C

onfiguration procedure,12  
C

onfiguration procedure,99  
C

onfiguration...

 195 
DHCP snooping configuration task list,74 
DHCP sn
ooping functions, 71 
DHCP sn

ooping support for Option 82, 73 
D

HCPv6 address/prefix assignment, 14 3 
D

HCPv6 relay agent configuration example, 15 7 
D

HCPv6 server configuration example, 151 
D

HCPv6 server configuration task list, 14 8 
D

HCPv6 snooping configuration example, 16 6 
Displa

ying and maintaining ARP, 6 
Displa

ying and maintaining ARP snooping, 21 
Displa

ying and maintaining BOOTP client 
configuration, 84 
Displa

ying...

 196 
Setting the DSCP value for DHCP packets,50 
S
etting the DSCP value for DHCPv6 packets, 151 
S

etting the DSCP value for DHCPv6 packets, 15 7 
S

etting the DSCP value for DHCPv6 packets, 16 0 
S

etting the DSCP value for DNS packets, 90 
S

etting the DSCP value for IPv6 DNS packets, 16 9 
S

pecifying the source interface for DNS packets, 90 
S

pecifying the threshold for sending trap messages, 50 
S

tateless DHCPv6 configuration example, 161 
S

tatic domain name resolution configuration...

i 
Contents 
IP routing basics ··················\
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Hardware compatibility ··················\
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Overview ··················\
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ii 
Configuring an additional routing metric ··················\
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Configuring RIPv2 ro ute summarization··················\
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Disabling host ro ute reception ··················\
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