Yet another question. I am aware the down bit is set when the summary routes (type-3 lsa) are redistributed from PE to CE so that other PE routers will ignore the LSA. But it is not set in Type-5 LSA (not tested with type-7)..
Though, http://tools.ietf.org/html/rfc4576 says "When the PE receives, from a CE router, a type 3, 5, or 7 LSA with the DN bit set, the information from that LSA MUST NOT be used during the OSPF route calculation. As a result, the LSA is not translated into a BGP route. The DN bit MUST be ignored in all other LSA types" Is there any reason why we are not using/set "DN" bit for type-5/7 as well and using "domain tag" instead? R6#show ip ospf database summary 100.100.100.100 OSPF Router with ID (6.6.6.6) (Process ID 1) Summary Net Link States (Area 0) Routing Bit Set on this LSA LS age: 39 Options: (No TOS-capability, DC, Downward) LS Type: Summary Links(Network) Link State ID: 100.100.100.100 (summary Network Number) Advertising Router: 13.1.2.1 LS Seq Number: 80000001 Checksum: 0x7A9D Length: 28 Network Mask: /32 TOS: 0 Metric: 2 R6#show ip ospf database external 22.22.22.22 OSPF Router with ID (6.6.6.6) (Process ID 1) Type-5 AS External Link States Routing Bit Set on this LSA LS age: 44 Options: (No TOS-capability, DC) LS Type: AS External Link Link State ID: 22.22.22.22 (External Network Number ) Advertising Router: 13.1.2.1 LS Seq Number: 80000002 Checksum: 0xAAB9 Length: 36 Network Mask: /32 Metric Type: 2 (Larger than any link state path) TOS: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 3489660929 R6# Thanks, Venkat On Tue, Mar 16, 2010 at 2:46 AM, venkat <[email protected]> wrote: > ha. My Bad... Thanks Marko.. Forgot that only inter and intra area ospf > routes are redistributed by default.. :) > Now everything looks good. > > Regards, > venkat > > > On Tue, Mar 16, 2010 at 2:39 AM, Marko Milivojevic <[email protected]>wrote: > >> Try this in BGP config for VRF one: >> >> redist ospf 2 vrf one match internal external >> >> -- >> Marko Milivojevic - CCIE #18427 >> Senior Technical Instructor - IPexpert >> >> Mailto: [email protected] >> Telephone: +1.810.326.1444 >> Fax: +1.810.454.0130 >> Web: http://www.ipexpert.com/ >> >> On Mon, Mar 15, 2010 at 21:07, venkat <[email protected]> wrote: >> > Hi, >> > I am stuck with a problem. In the below topology; >> > CE1------PE1----- MPLS---- PE2----CE2 >> > CE1 is sending OSPF type-5 external LSA (generated by a redistributing >> > specific loopback IP) and i could see this lsa in PE1's ospf database. >> But, >> > not in BGP vpnv4 table. Is this expected behavior? I though as the >> tag=0,by >> > default, E2 routes are not redistributed into BGP vpnv4. tried with >> changing >> > tag value to 100 and still no success. >> > Below is the configuration; >> > <snip from R0-CE1> >> > Type-5 AS External Link States >> > Link ID ADV Router Age Seq# Checksum Tag >> > 22.22.22.22 100.100.100.100 463 0x80000001 0x003B17 100 >> > <From R1 - PE1> >> > OSPF 1 VRF >> > Type-5 AS External Link States >> > Link ID ADV Router Age Seq# Checksum Tag >> > 22.22.22.22 100.100.100.100 715 0x80000001 0x003B17 100 >> > R2# >> > ! >> > address-family ipv4 vrf one >> > redistribute ospf 2 vrf one >> > no synchronization >> > exit-address-family >> > R2# >> > R2#show ip bgp vpnv4 vrf one <<< not seeing type-5 LSA >> > BGP table version is 50, local router ID is 2.2.2.2 >> > Status codes: s suppressed, d damped, h history, * valid, > best, i - >> > internal, >> > r RIB-failure, S Stale >> > Origin codes: i - IGP, e - EGP, ? - incomplete >> > Network Next Hop Metric LocPrf Weight Path >> > Route Distinguisher: 1:1 (default for vrf one) >> > *> 11.1.1.0/24 0.0.0.0 0 32768 ? >> > *> 12.1.1.0/24 0.0.0.0 0 32768 ? >> > *>i13.1.1.0/24 5.5.5.5 0 100 0 ? >> > *>i13.1.2.0/24 5.5.5.5 0 100 0 ? >> > *> 100.100.100.100/32 >> > 12.1.1.2 2 32768 ? >> > *>i192.168.2.0 5.5.5.5 2 100 0 ? >> > R2# >> > Thanks, >> > Venkat >> > http://ippoint.wordpress.com/ >> > >> > _______________________________________________ >> > For more information regarding industry leading CCIE Lab training, >> please >> > visit www.ipexpert.com >> > >> > >> > >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
