I should have mentioned that this was before route-leaking
From: Rick Mur [mailto:[email protected]] Sent: Sunday, December 20, 2009 8:20 AM To: Thomas J. Loran Cc: [email protected]; Marko Milivojevic Subject: Re: Volume 2 section 1 Multiprotocol Challange lab ISIS task 2.2 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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