Once you enable route leaking, in some cases the default will not be advertised anymore. I believe this has to do with the S train specifically. Try and remove the route-leaking and see if you then receive a default on R2.
-- Regards, Rick Mur CCIE2 #21946 (R&S / Service Provider) Sr. Support Engineer – IPexpert, Inc. URL: http://www.IPexpert.com On 19 dec 2009, at 22:43, Thomas J. Loran wrote: > In the Vol II section 1 multiprotocol Challenge A task 2.2 we have to > leak additional routes into R2 so everything stays connected if one of the > link goes down. I understand that. I know that I need /32 for routes later > on. > > What I do not understand is why R1 and R5, the L1/L2 routers do not leak a > default route into R2. I thought the L1/L2 routers were supposed to set > the ATT bit so R2 has a way out of the network > > R2# > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > R1.00-00 0x00000031 0x6E4B 1058 0/0/0 > R2.00-00 * 0x00000032 0x4661 977 0/0/0 > R5.00-00 0x00000035 0xAECD 980 0/0/0 > R5.03-00 0x00000008 0x2B7D 960 0/0/0 > > > R1#sh isi database > > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > R1.00-00 * 0x00000031 0x6E4B 891 0/0/0 > R2.00-00 0x00000032 0x4661 806 0/0/0 > R5.00-00 0x00000035 0xAECD 809 0/0/0 > R5.03-00 0x00000008 0x2B7D 790 0/0/0 > IS-IS Level-2 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > R1.00-00 * 0x0000000B 0x0EBF 886 0/0/0 > R5.00-00 0x0000000B 0x1228 518 0/0/0 > R1# > > R5#sh is database > > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > R1.00-00 0x00000031 0x6E4B 844 0/0/0 > R2.00-00 0x00000032 0x4661 763 0/0/0 > R5.00-00 * 0x00000035 0xAECD 769 0/0/0 > R5.03-00 * 0x00000008 0x2B7D 750 0/0/0 > IS-IS Level-2 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > R1.00-00 0x0000000B 0x0EBF 840 0/0/0 > R5.00-00 * 0x0000000B 0x1228 476 0/0/0 > > > > I do not see any ATT bit being set and L2 is definitely an L1 only router and > R! and R5 are definitely L1/L2 routers. In Doyles’ Volume 1 Routing book > page 580 he discusses this and suggests turning on CLNS routing on both the > interface and the routers (default) I did that and am still not getting the > ATT bit set. > > What am I doing wrong? AM I wrong to look for the ATT bit / default route in > this scenario? > > All three routers are 7200 running version 12.2(18)S2 > > thanks > > Thomas Loran > CCIE #7113 >
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