
C
HAPTER
49
| IP Interface Commands
IPv6 to IPv4 Tunnels
– 1698 –
tunnel destination
This command sets the IPv4 address of a tunnel destination (or far end-
point of a tunnel). Use the
no
form to remove the assigned IPv4 address.
S
YNTAX
tunnel destination
ip-address
no tunnel destination
ip-address
- IPv4 address of the device at the far end of the tunnel.
D
EFAULT
S
ETTING
None
C
OMMAND
M
ODE
Interface Configuration (IPv6/v4 Tunnel)
C
OMMAND
U
SAGE
◆
This command is only applicable to the “configured” tunnel mode (see
the
command).
◆
When an IPv6 packet is transmitted over a tunnel, the tunnel end-point
address configured by this command is used as the destination address
for the encapsulating IPv4 header.
◆
The determination of which packets to tunnel is based on information in
the routing table, which directs packets based on their destination
address using the prefix mask and match technique.
◆
IPv6/IPv4 hosts that are connected to data links with no IPv6 routers
may use a configured tunnel to reach an IPv6 router. This tunnel
allows the host to communicate with the rest of the IPv6 Internet (i.e.,
nodes with IPv6-native addresses). If the IPv4 address of an IPv6/IPv4
router bordering the IPv6 backbone is known, this can be used as the
tunnel end-point address. This tunnel can be configured into the
routing table as an IPv6 “default route.” That is, all IPv6 destination
addresses will match the route and could potentially traverse the
tunnel. Since the “mask length” of such a default route is zero, it will be
used only if there are no other routes with a longer mask that match
the destination. Note that the default configured tunnel can also be
used in conjunction with 6to4 automatic tunneling.
◆
The tunnel end-point address of a default tunnel could be the IPv4
address of one IPv6/IPv4 router at the border of the IPv6 backbone.
Alternatively, the tunnel end point could be an IPv4 “anycast address.”
Using this approach, multiple IPv6/IPv4 routers at the border advertise
IPv4 reachability to the same IPv4 address. All of these routers accept
packets to this address as their own, and will decapsulate IPv6 packets
tunneled to this address. When an IPv6/IPv4 node sends an
encapsulated packet to this address, it will be delivered to only one of
the border routers, usually the closest one.
◆
Care must be taken when using a default tunnel to prevent different
IPv4 fragments from arriving at different routers for reassembly. This
can be prevented by either avoiding fragmentation of the encapsulated
Содержание ECS4660-28F
Страница 1: ...Management Guide www edge core com ECS4660 28F Layer 3 Gigabit Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 12: ...ABOUT THIS GUIDE 12...
Страница 64: ...CONTENTS 64...
Страница 90: ...TABLES 90...
Страница 92: ...SECTION I Getting Started 92...
Страница 122: ...SECTION II Web Configuration 122 Multicast Routing on page 825...
Страница 148: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 148...
Страница 224: ...CHAPTER 5 Interface Configuration VLAN Trunking 224 Figure 68 Configuring VLAN Trunking...
Страница 262: ...CHAPTER 6 VLAN Configuration Configuring VLAN Translation 262...
Страница 304: ...CHAPTER 9 Congestion Control Automatic Traffic Control 304...
Страница 340: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 340...
Страница 452: ...CHAPTER 13 Security Measures DHCP Snooping 452...
Страница 740: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 740...
Страница 866: ...CHAPTER 21 Multicast Routing Configuring PIMv6 for IPv6 866...
Страница 882: ...CHAPTER 22 Using the Command Line Interface CLI Command Groups 882...
Страница 1024: ...CHAPTER 26 Remote Monitoring Commands 1024...
Страница 1030: ...CHAPTER 27 Flow Sampling Commands 1030...
Страница 1088: ...CHAPTER 28 Authentication Commands PPPoE Intermediate Agent 1088...
Страница 1162: ...CHAPTER 29 General Security Measures Configuring Port based Traffic Segmentation 1162...
Страница 1186: ...CHAPTER 30 Access Control Lists ACL Information 1186...
Страница 1214: ...CHAPTER 31 Interface Commands Transceiver Threshold Configuration 1214...
Страница 1238: ...CHAPTER 33 Port Mirroring Commands RSPAN Mirroring Commands 1238...
Страница 1258: ...CHAPTER 34 Congestion Control Commands Automatic Traffic Control Commands 1258...
Страница 1270: ...CHAPTER 36 UniDirectional Link Detection Commands 1270...
Страница 1276: ...CHAPTER 37 Address Table Commands 1276...
Страница 1336: ...CHAPTER 39 ERPS Commands 1336...
Страница 1386: ...CHAPTER 40 VLAN Commands Configuring Voice VLANs 1386...
Страница 1406: ...CHAPTER 41 Class of Service Commands Priority Commands Layer 3 and 4 1406...
Страница 1424: ...CHAPTER 42 Quality of Service Commands 1424...
Страница 1536: ...CHAPTER 43 Multicast Filtering Commands MLD Proxy Routing 1536...
Страница 1602: ...CHAPTER 45 CFM Commands Delay Measure Operations 1602...
Страница 1624: ...CHAPTER 47 Domain Name Service Commands 1624...
Страница 1646: ...CHAPTER 48 DHCP Commands DHCP Server 1646...
Страница 1974: ...SECTION IV Appendices 1974...
Страница 1980: ...APPENDIX A Software Specifications Management Information Bases 1980...
Страница 2020: ...ECS4660 28F E102013 ST R03 149100000140A...