Which switches support ipv6

A lifetime value for the RDNSS can optionally be specified with this command, and overrides any default value configured for the interface using the ipv6 nd ra dns-servers lifetime command.

The no ipv6 nd ra dns-server and default ipv6 nd ra dns-server commands remove the corresponding ipv6 nd ra dns-server command from running-config. The ipv6 nd ra dns-servers lifetime command sets the default value that the configuration mode interface uses for the lifetime of any Recursive DNS Server RDNSS configured on the interface.

The lifetime value is the maximum amount of time after a route advertisement packet is sent that the RDNSS referenced in the packet may be used for name resolution. The no ipv6 nd ra dns-servers lifetime and default ipv6 nd ra dns-servers lifetime commands remove the default lifetime value from the interface by removing the corresponding ipv6 nd ra dns-servers lifetime command from running-config.

A lifetime value for the DNSSL can optionally be specified with this command, and overrides any default value configured for the interface using the ipv6 nd ra dns-suffixes lifetime command.

The no ipv6 nd ra dns-suffix and default ipv6 nd ra dns-suffix commands remove the corresponding ipv6 nd ra dns-suffix command from running-config. The ipv6 nd ra dns-suffixes lifetime command sets the default value that the configuration mode interface uses for the lifetime of any DNS Search List DNSSL configured on the interface.

The lifetime value is the maximum amount of time after a route advertisement packet is sent that the DNSSL included in the packet may be used for name resolution.

The no ipv6 nd ra dns-suffixes lifetime and default ipv6 nd ra dns-suffixes lifetime commands remove the default lifetime value from the interface by removing the corresponding ipv6 nd ra dns-suffixes lifetime command from running-config. The ipv6 nd ra hop-limit command sets a suggested hop-limit value to be included in Router Advertisement RA packets.

The hop-limit value is to be used by attached hosts in outgoing packets. The no ipv6 nd ra hop-limit and default ipv6 nd ra hop-limit commands remove the corresponding ipv6 nd ra hop-limit command from running-config. The ipv6 nd ra interval command configures the interval between IPv6 Router Advertisement transmissions from the configuration mode interface. The no ipv6 nd ra interval and default ipv6 nd ra interval commands return the IPv6 RA transmission interval for the configuration mode interface to the default value of seconds by removing the corresponding ipv6 nd ra interval command from running-config.

The ipv6 nd ra lifetime command specifies the value that the switch places in the router lifetime field of IPv6 Router Advertisements sent from the configuration mode interface. The no ipv6 nd ra lifetime and default ipv6 nd ra lifetime commands return the IPv6 RA lifetime data entry filed for the configuration mode interface to the default value of seconds by removing the corresponding ipv6 nd ra lifetime command from running-config.

The no ipv6 nd ra mtu suppress and default ipv6 nd ra mtu suppress commands restores the MTU option setting to enabled by for the configuration mode interface by removing the corresponding ipv6 nd ra mtu suppress command from running-config. The ipv6 nd reachable-time command specifies the time period that the switch includes in the reachable time field of RAs sent from the configuration mode interface. RAs that advertise zero seconds indicate that the router does not specify a reachable time.

The default advertisement value is 0 seconds. The switch reachability default period is 30 seconds. The no ipv6 nd reachable-time and default ipv6 nd reachable-time commands restore the entry of the default value 0 in RAs sent from the configuration mode interface by deleting the corresponding ipv6 nd reachable-time command from running-config.

Value ranges from 0 to Default is 0. The ipv6 nd router-preference command specifies the value that the switch enters in the Default Router Preference DRP field of Router Advertisements RAs that it sends from the configuration mode interface.

The no ipv6 nd router-preference and default ipv6 nd router-preference commands restore the switch to enter the default DRP field value of medium in RAs sent from the configuration mode interface by deleting the corresponding ipv6 nd router-preference command from running-config.

The ipv6 neighbor cache persistent command restores the IPv6 neighbor cache after reboot. The no ipv6 neighbor cache persistent and default ipv6 neighbor cache persistent commands remove the ARP cache persistant configuration from the running-config. The ipv6 neighbor command creates an IPv6 neighbor discovery cache static entry. The command converts pre-existing dynamic cache entries for the specified address to static entries.

The no ipv6 neighbor and default ipv6 neighbor commands remove the specified static entry from the IPV6 neighbor discovery cache and delete the corresponding ipv6 neighbor command from running-config. These commands do not affect any dynamic entries in the cache.

The no ipv6 route and default ipv6 route commands delete static routes by removing the corresponding ipv6 route statements from running-config. Commands not including a source delete all statements to the destination.

Only statements with parameters that match specified command arguments are deleted. Parameters that are not in the command line are not evaluated. The no ipv6 unicast-routing and default ip ipv6 unicast-routing commands disable IPv6 unicast routing by removing the ipv6 unicast-routing command from running-config. Dynamic routes added by routing protocols are removed from the routing table. Static routes are preserved by default; the delete-static-routes option removes static entries from the routing table.

The no ipv6 verify and default ipv6 verify commands disable uRPF on the configuration mode interface by deleting the corresponding ipv6 verify command from running-config. Subsequent ip verify commands on any interface do not disable IPv6 routing.

The no ipv6 dhcp snooping and default ipv6 dhcp snooping commands disable global DHCP snooping by removing the ipv6 dhcp snooping command from running-config. The no pim ipv6 sparse-mode and default pim ipv6 sparse-mode commands restore the default PIM and IGMP router mode settings of disabled on the configuration mode interface by removing the pim ipv6 sparse-mode command from running-config.

The show ipv6 dhcp snooping counters command displays counters that track the quantity of DHCP request and reply packets that the switch receives. The show ipv6 dhcp snooping hardware command displays internal hardware DHCP snooping status on the switch. The show ipv6 dhcp snooping command displays information about the DHCP snooping configuration. The show ipv6 hardware fib aggregate-address command displays the IPv6 prefixes that are restricted from entry into the hardware routing table.

The ipv6 hardware fib aggregate-address command configures IPv6 prefix restictions. The ipv6 interface command displays the status of specified routed interfaces that are configured for IPv6. The ipv6 nd ra internal state command displays the state of the IPv6 Router Advertisement RA daemon for the specified routable interface.

The show ipv6 neighbors command displays the IPv6 neighbor discovery cache. The command provides filters to restrict the list to a specified IPv6 address or routable interface. The show ipv6 route age command displays the IPv6 route age to the specified IPv6 address or prefix. The show ipv6 route interface command displays routing table entries on a specified routed port. The show ipv6 route match tag command displays the route tag assigned to the specified IPv6 address or prefix. Route tags are added to static routes for use by route maps.

The show ipv6 route summary command displays the information about the IPv6 routing table. The show ipv6 route command displays IPv6 routing table entries that are in the Forwarding Information Base FIB , including static routes, routes to directly connected networks, and dynamically learned routes. Multiple equal cost paths to the same prefix are displayed contiguously as a block, with the destination prefix displayed only on the first line.

The show running-config command displays all configured routes. EOS 4. IPv6 specifies a packet format that minimizes router processing of packet headers. Since the IPv4 and IPv6 packet headers differ significantly, the protocols are not interoperable. Many transport and application-layer protocols require little or no change to operate over IPv6. IPv6 addresses have bits, represented by eight bit hexadecimal numbers separated by colons.

IPv6 addresses are abbreviated as follows: Leading zeros in each bit number may be omitted. One set of consecutive bit numbers that equal zero may be replaced by a double colon. The following three IPv6 hexadecimal number representations refer to the same address: d28efed d28efed d28efed Unicast and anycast addresses are typically composed as follows: A bit network prefix that identifies the network segment.

A bit interface identifier that is based on interface MAC address. The format of a network address identifies the scope of the address: Global address: valid in all networks and connect with other addresses with global scope anywhere or to addresses with link-local scope on the directly attached network.

Link-local address: scope extends only to the link to which the interface is directly connected. Link-local addresses are not routable off the link. Figure 2. Link Local Address Derivation.

I was totally wrong. So, my question is not relevant! This is a showstopper for many uses FTTH. Thomas Thomas 1, 11 11 silver badges 14 14 bronze badges. Hopefully the number of prefixes will actually be less for IPv6, due to less need for a single organization to announce multiple prefixes. The IPv6 headers and subnetting are designed to lessen the load on routers and switches by reducing the size of routing tables.

This will mainly have an effect on the internet's core routers though, which are currently straining under the huge routing tables that IPv4 subclassing has imposed. Joseph Joseph 3, 25 25 silver badges 33 33 bronze badges. First question: "almost all switchs and routers are not working with IPv6 packets" Depends on your definition of "working".

IPv4 Second: New Firmware vs. New Investements My guess is that for the larger product series there will be firmware upgrades, but the small to mid networking equipment won't get firmware updates so that they will have feature equality in IPv6 and IPv4 As soon as you start running IPv6 and IPv4 in parallel at least your routing tables will grow on the routers after all you need to be able to route both protocols , so it will be more demanding to your infrastructure.

Martin M. Russell Heilling Russell Heilling 2, 19 19 silver badges 21 21 bronze badges. Michael Dillon Michael Dillon 1, 12 12 silver badges 16 16 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

Email Required, but never shown. The Overflow Blog. Podcast Explaining the semiconductor shortage, and how it might end. Does ES6 make JavaScript frameworks obsolete? Featured on Meta. Now live: A fully responsive profile. Related Hot Network Questions. As Skillet said, it's layer 2, switches don't care.

In fact I'm ashamed to say the switch I'm using at home, which all my stuff is dual stack, is from the late 90s and it works fine. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks.

Thanks to anybody who can clear this up. Popular Topics in General Networking. If you need layer-3 functions on the switch routing between ports or VLANs, filtering based on IP addresses, or similar you'll need to check the device specifications. The same goes for the management interface which doesn't usually hurt staying on IPv4 for now. Most of your switches are unmanaged ones. They don't make any difference between IPv4 and IPv6 at all.

Nearly all of the managed switches are layer-2 only switches, they don't make a difference either, except for the management functions. Sign up to join this community. The best answers are voted up and rise to the top.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How to check if switch is ipv6 fully compatible Ask Question. Asked 3 years, 2 months ago. Active 3 years, 2 months ago.