Has anyone done a BGP4 peering between an Ascend GRF and a Cisco IOS when there is an extra hop in between? I want to be on the lookout for the pitfalls. The Ascend GRF will be on my side, as well the extra hop which is needed because Ascend isn't shipping T1 media cards for the GRF, yet. So we have to do with an ethernet first link out. I'm assuming both of my upstreams are running Cisco 7xxx. The topology looks like: ------- ------ | CRL |---T1---|P400|-- ---- servers ------- ------ \ / --------- |GRF 400|-- dialup --------- ------- ------ / \ | MCI |---T1---|P400|-- ---- dedicated ------- ------ When the T1 cards show up, I plan to simplify the topology. -- Phil Howard +-------------------------------------------------------------+ KA9WGN | House committee changes freedom bill to privacy invasion !! | phil at | more info: http://www.news.com/News/Item/0,4,14180,00.html | milepost.com +-------------------------------------------------------------+
On Tue, 23 Sep 1997, Phil Howard wrote:
Has anyone done a BGP4 peering between an Ascend GRF and a Cisco IOS when there is an extra hop in between? I want to be on the lookout for the pitfalls. The Ascend GRF will be on my side, as well the extra hop which is needed because Ascend isn't shipping T1 media cards for the GRF, yet. So we have to do with an ethernet first link out. I'm assuming both of my upstreams are running Cisco 7xxx. The topology looks like:
------- ------ | CRL |---T1---|P400|-- ---- servers ------- ------ \ / --------- |GRF 400|-- dialup --------- ------- ------ / \ | MCI |---T1---|P400|-- ---- dedicated ------- ------
When the T1 cards show up, I plan to simplify the topology.
For what it is worth, the CRL router you connect to will probably not be your BGP peer, if they do it the way they did with us and with other people I talked to. In our case, it was 3 hops away. John Tamplin Traveller Information Services jat@Traveller.COM 2104 West Ferry Way 205/883-4233x7007 Huntsville, AL 35801
On Tue, 23 Sep 1997 20:56:16 -0500 Phil Howard <phil@charon.milepost.com> wrote:
Has anyone done a BGP4 peering between an Ascend GRF and a Cisco IOS when there is an extra hop in between? I want to be on the lookout for the pitfalls. The Ascend GRF will be on my side, as well the extra hop which is needed because Ascend isn't shipping T1 media cards for the GRF, yet. So we have to do with an ethernet first link out. I'm assuming both of my upstreams are running Cisco 7xxx. The topology looks like:
I've not done it with the GRF but I have done this with BSD/OS and gated, and it worked OK. [still is working AFAIK :-)] [ 8 baynard-mega-int-e3.bt.net (194.72.1.254) 40.246 ms 19.178 ms 10.848 ms 9 galaxians.router.easynet.net (193.131.248.185) 23.402 ms 45.58 ms 45.057 ms ] When we did this is just worked. Although I'm not sure what BTnet did [if anything] to make the intermediate hop work ok. They need to specify egp-multihop Cheers, Neil. -- Neil J. McRae. Alive and Kicking. Domino: In the glow of the night. neil@DOMINO.ORG NetBSD/sparc: 100% SpF (Solaris protection Factor) Free the daemon in your <A HREF="http://www.NetBSD.ORG/">computer!</A>
participants (3)
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John A. Tamplin -
Neil J. McRae -
Phil Howard