Re: IPV6 Tunnels...

From: Narbik Kocharians (narbikk@gmail.com)
Date: Mon Mar 09 2009 - 05:23:52 ARST

Thanks mate, but here in GS, i do not want to be boring and respond in 149
pages.

See you soon, study hard.

On Mon, Mar 9, 2009 at 12:18 AM, Thameem Maranveetil Parambath <
tparamba@thecontactcentre.ae> wrote:

>
> Narbik,
>
> I have done all those wonderful labs.. its awesome.. and i agree it
> contains more explanation .. but the way you presented here is in short
> good..
>
> Regards,
>
>
>
> *Narbik Kocharians <narbikk@gmail.com>*
> Sent by: nobody@groupstudy.com
>
> 09/03/2009 10:56 AM Please respond to
> Narbik Kocharians <narbikk@gmail.com>
>
> To
> Thameem Maranveetil Parambath <tparamba@thecontactcentre.ae>
> cc
> Cisco certification <ccielab@groupstudy.com>, GAURAV MADAN <
> gauravmadan1177@gmail.com>, Modular <modulartx@gmail.com>,
> nobody@groupstudy.com, Scott Morris <smorris@internetworkexpert.com>
> Subject
> Re: IPV6 Tunnels...
>
>
>
>
> Thameem,
>
> I hate to do this to you, but this came right out of the WORK BOOK,
> actually
> the work book has MORE explanation, but you need to open up the pages and
> read. have you been studying or just playing around?
>
> On Sun, Mar 8, 2009 at 9:27 PM, Thameem Maranveetil Parambath <
> tparamba@thecontactcentre.ae> wrote:
>
> >
> > Narbik,
> >
> > This is more explained than the one you give in the workbook ;)
> >
> > Is there no IPv4/IPv6 tunnel ?
> >
> > Also soln 3: Eventhough it is not having tunnel mode command, it will
> use
> > GRE by default right? I would say this is the GRE tunnel fo IPv6/IPv4
> >
> > Warm Regards,
> >
> >
> >
> >
> > *Narbik Kocharians <narbikk@gmail.com>*
> > Sent by: nobody@groupstudy.com
> >
> > 08/03/2009 08:55 PM Please respond to
> > Narbik Kocharians <narbikk@gmail.com>
> >
> > To
> > Scott Morris <smorris@internetworkexpert.com>
> > cc
> > GAURAV MADAN <gauravmadan1177@gmail.com>, Modular <modulartx@gmail.com>,
> > Cisco certification <ccielab@groupstudy.com> Subject
> > Re: IPV6 Tunnels...
> >
> >
> >
> >
> > Modular,
> >
> >
> > *There are 5 tunneling solution in IPv6:*
> >
> >
> >
> > *1. Using the "Tunnel mode ipv6ip", in this case the tunnel source and
> > destination are configured with IPv4 addressing and the tunnel interface
> is
> > configured with IPv6. This will use protocol 41. This is used for
> > IPv6/IPv4.
> > *
> >
> >
> >
> > R1(config)#int tunnel 1
> >
> > R1(config-if)#ipv6 address 12:1:12::1/64
> >
> > R1(config-if)#tunnel source 10.1.12.1
> >
> > R1(config-if)#tunnel destination 10.1.12.2
> >
> > R1(config-if)#*tunnel mode ipv6ip*
> >
> >
> >
> > *2. Using the "Tunnel mode gre ipv6", in this case the tunnel source and
> > destination are all configured with IPv6 addressing. This is used for
> > IPv6/IPv6. *
> >
> >
> >
> > BB1(config)#int tunnel 1
> >
> > BB1(config-if)#ipv6 address 121:1:121::111/64
> >
> > BB1(config-if)#tunnel source 10:1:111::111
> >
> > BB1(config-if)#tunnel destination 10:1:112::112
> >
> > BB1(config-if)#*tunnel mode gre ipv6*
> >
> >
> >
> > *3. In this case, the tunnel mode is NOT used at all, note that the
> tunnel
> > interface is configured with IPv6 and the tunnel source and destination
> is
> > configured with IPv4 but no mention of tunnel mode. This configuration
> will
> > use protocol 47. This is used for IPv6/IPv4. *
> >
> >
> >
> > R1(config)#int tunnel 13
> >
> > R1(config-if)#ipv6 address 13:1:13::1/64
> >
> > R1(config-if)#tunnel source 10.1.13.1
> >
> > R1(config-if)#tunnel destination 10.1.13.3
> >
> >
> >
> > *4. Note in this case a special addressing is assigned to the tunnel
> > interface which is a concatenation of a reserved IPv6 address of
> > 2002followed by the translated
> >
> > IPv4 address of a given interface on the router. In this configuration
> ONLY
> > the tunnel source address is used and since the tunnel is automatic,
> > the destination
> > address is NOT configured. The tunnel mode is set to "Tunnel mode ipv6ip
> > 6to4". Note the IPv4 address of 10.1.1.1 is translated to 0A.01.01.01 and
> > once concatenated, it will be "2002:0A01:0101: or 2002:A01:101. This is
> > used
> > for IPv6/IPv4.*
> >
> >
> >
> > R1(config)#interface Tunnel14
> >
> > R1(config-if)#ipv6 address 2002:A01:101::/128
> >
> > R1(config-if)#tunnel source 10.1.1.1
> >
> > R1(config-if)#*tunnel mode ipv6ip 6to4*
> >
> >
> >
> > *5. ISATAP, ISATAP works like 6to4 tunnels, with one major difference, it
> > uses a special IPv6 address which is formed as follows: *
> >
> > *In this tunnel mode, the network portion can be any IPv6 address,
> whereas,
> > in 6to4 it had to start with 2002.*
> >
> > *Note when the IPv6 address is assigned to the tunnel interface, the
> > "eui-64" is used, in this case the host portion of the IPv6 address
> starts
> > with "0000.5EFE" and then the rest of the host portion is the translated
> > IPv4 address of the tunnel's source IPv4 address. This translation is
> > performed automatically unlike 6to4. This is used for IPv6/IPv4.*
> >
> >
> >
> > R4(config)#int tunnel 46
> >
> > R4(config-if)#ipv6 address 46:1:46::/64 eui-64
> >
> > R4(config-if)#tunnel source 10.44.44.44
> >
> > R4(config-if)#*tunnel mode ipv6ip ISATAP*
> >
> > *A "Show ipv6 int tunnel xx" will reveal the IPv6 address, in this case
> > 10.44.44.44 is used so 10 is translated to "0A" and 44 is translated to
> > "2C", therefore, your new address should be "46:1:46::5EFE:a2c.2c2c"*
> > I hope this helped.
> >
> > On Sun, Mar 8, 2009 at 6:22 AM, Scott Morris <
> > smorris@internetworkexpert.com
> > > wrote:
> >
> > > The pro/con I'd look at is overall packet size.
> > >
> > > IPv6IP you have a 40-byte IPv6 header + 20-byte IP header
> > >
> > > GRE you have a 40-byte IPv6 header + 8 byte GRE header + 20 byte IP
> > header
> > >
> > > Which is smaller?
> > >
> > > Scott
> > >
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > > GAURAV MADAN
> > > Sent: Sunday, March 08, 2009 7:18 AM
> > > To: Modular
> > > Cc: Cisco certification
> > > Subject: Re: IPV6 Tunnels...
> > >
> > > No pros / cons as such .. but sometimes language of ques can make us go
> > mad
> > >
> > > protocol 47 : GRE
> > > protocol 41 : IPV6IP
> > >
> > > I rememebr these 2 numbers always and can be useful in desiging ACLs as
> > > well
> > >
> > >
> > > Gaurav Madan.
> > >
> > > On Sun, Mar 8, 2009 at 4:37 AM, Modular <modulartx@gmail.com> wrote:
> > >
> > > > So I've learned that if you want to tunnel IPv6 over IPv4, there are
> > two
> > > > easy options you can turn to.
> > > >
> > > > 1. Normal GRE tunnel, using the default tunnel type.
> > > >
> > > > 2. Configuring ipv6ip tunnel type.
> > > >
> > > > What are the pros/cons of using each?
> > > >
> > > > Thanks,
> > > > Mod...
> > > >
> > > >
> > > > Blogs and organic groups at http://www.ccie.net
> > > >
> > > >
> _______________________________________________________________________
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> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Narbik Kocharians
> > CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> > www.MicronicsTraining.com <http://www.micronicstraining.com/> <
> http://www.micronicstraining.com/>
> > www.Net-Workbooks.com <http://www.net-workbooks.com/> <
> http://www.net-workbooks.com/>
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> >
> >
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> >
> >
> >
> >
> >
> >
> >
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> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
> www.Net-Workbooks.com <http://www.net-workbooks.com/>
> Sr. Technical Instructor
>
>
> Blogs and organic groups at http://www.ccie.net
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-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
www.Net-Workbooks.com
Sr. Technical Instructor

Blogs and organic groups at http://www.ccie.net

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