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Hi, I’m using a C3750 on which I would like to modify the IPv6 MTU for a GRE tunnel interface.I’m running a 12.2(46)SE release of IOS and the “ipv6 mtu” command is not available.Is there a way to change this value ?Why I need this change ?I’ve a GRE ...

omartinet by Level 1
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  • 3 replies
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Hello,I've a questiona about IPv6 Global Prefix RA.I have 2 routers (r1 and r2) connected via fastethernet0/0 interface.On the first router i have gone trough the ipv6 set up:1. I have create a ipv6 address: #ipv6 address 2001:aaa:bbbb:cccc::/64 eui-...

Hi everyone,While I research NDP functions both hosts and routers in IPV6 I can`t understand some issues about NDP behavior on nodes. I saw conceptual data structures and caches for host in lots of documents in addition to RFC 4861. My first question...

furkan023 by Level 1
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Hello.I am completely new in IPv6 and I started reading RFC 4861 for NDP.Can anyone help me understand the purpose of on-link prefixes and off-link prefixes? I believe the routers can advertise networks (using RA) as on-link or off-link. Does this me...

jcarvalh by Level 1
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Is there a way I can track the reachability of an IPv6 subnet with enhanced object tracking on Cisco ISR G2 routers (just like on IPv4)?Setup is as follow: We have an active and standby router on which we configure hsrp on the LAN. The hsrp standby p...

hii have usually heard that IPv6 resolved the problem of broadcasthowever today i read that the "neighbor discovery" ICMP message replaced the ARP requestbut this "neighbor discovery" is using the multicast as destination addressand if i m not wrong ...

ohassairi by Level 5
  • 2306 Views
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Hello everyone, I can`t understand the process of layer3 to layer2 address resolution in IPv6. In order to make a Layer-2 (eg. Ethernet) delivery, it needs to know the target host's hardware address (eg. "Ethernet MAC address"). But in order to do t...

furkan023 by Level 1
  • 3887 Views
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Hi All! have a challenge...Am working of MS UAG DirectAccess and we have 6 sites out there.The requirement was to also have manage-out functionality working.To get this done we have 1 global ISATAP cloud. In each Datacenter we have a Cisco 2800 runni...

From the cisco configuration guide;Perform this task to enable the DHCPv6 relay agent function and specify relay destination addresses on an interface. SUMMARY STEPS 1. enable 2. configure terminal 3. interface type number 4. ipv6 dhcp relay dest...

k.lingiah by Level 1
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I have a 1841 for home / practice use running  "c1841-advipservicesk9-mz.124-24.T3 IOS"Although i have enabled ipv6 unicast-routing when i switch to int dot11radio i cannot seemto be able to execute any ipv6 commands. I want to configure ipv6 for all...

nemiath76 by Level 1
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Hi  everybody.I am trying to establish a virtual link between R3 and R2 so area 2 can connect to area 0 and R1 will learn R4's loopback prefix 2000::4/128.Detail is given below:R1--s0/0---area 0---s0/0-R2--s0/1--area 1---s0/1-R3--s0/0---area 2-----s0...

sarahr202 by Level 5
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Hi,A while back the general advise was to assign a /64 for each and every VLAN. I still believe this to be true and a correct advise for all VLANs that connect end-users (because of auto address features and temporary addresses).But is this still tru...

etamminga by Spotlight
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Hi Everyone,In short: I am trying to get ipv4 and ipv6 over PPPoE running on my PIX515e.Heres a bit more info about my setup and the scenario:My internet provider (residential) has offered me a dual-stack service on my ADSL.I get a STATIC ipv4 addres...