Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Hop Count Limits

I understand that the hop count limits for networks running distance vector routing protocols are :-

RIP (v1 or v2) : 15

IGRP : 255 (with 100 the default limit)

Are these the correct figures ? Also are there any hop count limits applicable to networks running other types of routing protocol such as OSPF, EIGRP, and IS-IS ?

2 REPLIES
New Member

Re: Hop Count Limits

Yes...this is correct,

Other protocols doesn't have any hop count liit,

But still maixmum hopcount for other protocols remains 255 as max. As TTL is decreamented by 1 after corssing every hop. When ttl reaches to 0, that packets are dropped. any packet has max ttl value of 255, hence max hops for other protocols is 255.

Silver

Re: Hop Count Limits

TTL field itself is 8 bits, that's why you cannot have higher TTL than 255.

229
Views
7
Helpful
2
Replies